Published volumes

G.P. SINGH, S.S. MISHRA, P. SHARMA
A study on W₉-curvature tensor within the framework of Lorentzian para-Sasakian manifold

J. LLIBRE, L.P. SERANTOLA
The easiest polynomial differential systems in R³ having an invariant cylinder

	EXTRACTA MATHEMATICAE
	Vol. 39, Num. 2 (2024)

Convex Geometry

V. SOLTAN
Classes of homothetic convex sets
Extracta Math. 39(2) (2024), 135-171    [doi:10.17398/2605-5686.39.2.135]

Banach Space Theory

M. HRUŠÁK, L. SÁENZ
Some applications of Q-points and Lebesgue filters to Banach spaces
Extracta Math. 39(2) (2024), 173-187    [doi:10.17398/2605-5686.39.2.173]

H.D. CARRIÓN
c-Continuous polynomials on l₁
Extracta Math. 39(2) (2024), 189-206    [doi:10.17398/2605-5686.39.2.189]

F. CABELLO SÁNCHEZ
Accessible operators on ultraproducts of Banach spaces
Extracta Math. 39(2) (2024), 207-234    [doi:10.17398/2605-5686.39.2.207]

Non-Archimedean Functional Analysis

K. ISHIZUKA
A spectral theorem for a non-Archimedean valued field whose residue field is formally real
Extracta Math. 39(2) (2024), 235-254    [doi:10.17398/2605-5686.39.2.235]

M. BABAHMED
Some operators on finite-dimensional non-Archimedean normed spaces
Extracta Math. 39(2) (2024), 255-271    [doi:10.17398/2605-5686.39.2.255]

	EXTRACTA MATHEMATICAE
	Vol. 39, Num. 1 (2024)

Functional Analysis and Operator Theory

S.R. PATEL
On discontinuity of derivations, inducing inequivalent complete metric topologies
Extracta Math. 39(1) (2024), 1-17    [doi:10.17398/2605-5686.39.1.1]

M. WEIGT, I. ZARAKAS
The Arens-Calderon theorem for commutative topological algebras
Extracta Math. 39(1) (2024), 19-35    [doi:10.17398/2605-5686.39.1.19]

M. BOUDHIEF
Unbounded generalized B-Fredholm operators
Extracta Math. 39(1) (2024), 37-46    [doi:10.17398/2605-5686.39.1.37]

K. RAMANUJA RAO, K. RAMA PRASAD, G. VARA LAKSHMI, CH. SANTHI SUNDAR RAJ
A topological characterization of an almost Boolean algebra
Extracta Math. 39(1) (2024), 47-55    [doi:10.17398/2605-5686.39.1.47]

Differential Geometry

M. CRAMPIN
The current state of play in the Landsberg-Berwald problem of Finsler geometry
Extracta Math. 39(1) (2024), 57-95    [doi:10.17398/2605-5686.39.1.57]

E. HINAMARI MANG-MASSOU, A. NTYAM
On lifts of symplectic vector bundles and connections to Weil bundles
Extracta Math. 39(1) (2024), 97-118    [doi:10.17398/2605-5686.39.1.97]

Category Theory

P. BAHIRAEI, J. NAZARIPOUR
⊗-Pure model structure on the category of N-complexes
Extracta Math. 39(1) (2024), 119-134    [doi:10.17398/2605-5686.39.1.119]

	EXTRACTA MATHEMATICAE
	Vol. 38, Num. 2 (2023)

Rings and Algebras

A. SARIKAYA, Ö. GÖLBAŞI
Results on Lie ideals of prime rings with homoderivations
Extracta Math. 38(2) (2023), 125-137    [doi:10.17398/2605-5686.38.2.125]

General Topology and Measure Theory

P. BOUAFIA, T. DE PAUW
Radon-Nikodýmification of arbitrary measure spaces
Extracta Math. 38(2) (2023), 139-203    [doi:10.17398/2605-5686.38.2.139]

S. MACÍAS, S.B. NADLER, JR.
Continua whose hyperspace of subcontinua is infinite dimensional and a cone
Extracta Math. 38(2) (2023), 205-219    [doi:10.17398/2605-5686.38.2.205]

Geometry

J.B. SANCHO DE SALAS
The fundamental theorem of affine geometry
Extracta Math. 38(2) (2023), 221-235    [doi:10.17398/2605-5686.38.2.221]

Operator Theory

S.S. DRAGOMIR
Tensorial and Hadamard product inequalities for functions of selfadjoint operators in Hilbert spaces in terms of Kantorovich ratio
Extracta Math. 38(2) (2023), 237-250    [doi:10.17398/2605-5686.38.2.237]

	EXTRACTA MATHEMATICAE
	Vol. 38, Num. 1 (2023)

Topology

M. ELHAMDADI, T. GONA, H. LAHRANI
Topologies, posets and finite quandles
Extracta Math. 38(1) (2023), 1-15    [doi:10.17398/2605-5686.38.1.1]

Algebras (associative, non associative, topological)

MARTIN WEIGT
A note on isomorphisms of quantum systems
Extracta Math. 38(1) (2023), 17-25    [doi:10.17398/2605-5686.38.1.17]

T. CHTIOUI, S. MABROUK, A. MAKHLOUF
Construction of Hom-pre-Jordan algebras and Hom-J-dendriform algebras
Extracta Math. 38(1) (2023), 27-50    [doi:10.17398/2605-5686.38.1.27]

A. EN-GUADY, A. BOUA
On Jordan ideals with left derivations in 3-prime near-rings
Extracta Math. 38(1) (2023), 51-66    [doi:10.17398/2605-5686.38.1.51]

B. DHARA, S. GHOSH, G.S. SANDHU
On Lie ideals satisfying certain differential identities in prime rings
Extracta Math. 38(1) (2023), 67-84    [doi:10.17398/2605-5686.38.1.67]

Limit Circles

M. MOLAEIDERAKHTENJANI, O. RABIEIMOTLAGH, H.M. MOHAMMADINEJAD
Estimating the number of limit cycles for one step perturbed homogeneous degenerate centers
Extracta Math. 38(1) (2023), 85-104    [doi:10.17398/2605-5686.38.1.85]

Group Theory

A. CAVICCHIOLI, F. SPAGGIARI
The character variety of one relator groups
Extracta Math. 38(1) (2023), 105-123    [doi:10.17398/2605-5686.38.1.105]

	EXTRACTA MATHEMATICAE
	Vol. 37, Num. 2 (2022)

Nonassociative Rings and Algebras

M. POUYE, B. KPAMEGAN
Extensions, crossed modules and pseudo quadratic Lie type superalgebras
Extracta Math. 37(2) (2022), 153-184    [doi:10.17398/2605-5686.37.2.153]

Group Theory

O.O. GEORGE, J.O. OLALERU, J.O. ADÉNÍRAN, T.G. JAIYÉỌLÁ
On a class of power associative LCC-loops
Extracta Math. 37(2) (2022), 185-194    [doi:10.17398/2605-5686.37.2.185]

H.M. MOHAMMED SALIH, REZHNA M. HUSSEIN
Genus zero of projective symplectic groups
Extracta Math. 37(2) (2022), 195-210    [doi:10.17398/2605-5686.37.2.195]

Topology

C.A. DIMARCO
Topological Hausdorff dimension and Poincaré inequality
Extracta Math. 37(2) (2022), 211-221    [doi:10.17398/2605-5686.37.2.211]

Dynamical Systems

S. JAYARAMAN, Y.K. PRAJAPATY, S. SRIDHARAN
Dynamics of products of nonnegative matrices
Extracta Math. 37(2) (2022), 223-242    [doi:10.17398/2605-5686.37.2.223]

Banach Spaces

SUNG GUEN KIM
Smooth 2-homogeneous polynomials on the plane with a hexagonal norm
Extracta Math. 37(2) (2022), 243-259    [doi:10.17398/2605-5686.37.2.243]

Operator Theory

S.S. DRAGOMIR
Second derivative Lipschitz type inequalities for an integral transform of positive operators in Hilbert spaces
Extracta Math. 37(2) (2022), 261-282    [doi:10.17398/2605-5686.37.2.261]

	EXTRACTA MATHEMATICAE
	Vol. 37, Num. 1 (2022)

Banach Space and Algebras

J.M.F. CASTILLO
The hitchhiker guide to categorical Banach space theory. Part II
Extracta Math. 37(1) (2022), 1-56    [doi:10.17398/2605-5686.37.1.1]

M. WEIGT, I. ZARAKAS
On formal power series over topological algebras
Extracta Math. 37(1) (2022), 57-74    [doi:10.17398/2605-5686.37.1.57]

Operator Theory

M. LAJNEF, M. MNIF
On isolated points of the approximate point spectrum of a closed linear relation
Extracta Math. 37(1) (2022), 75-90    [doi:10.17398/2605-5686.37.1.75]

T. LUKOTO, H. RAUBENHEIMER
Perturbation ideals and Fredholm theory in Banach algebras
Extracta Math. 37(1) (2022), 91-110    [doi:10.17398/2605-5686.37.1.91]

Differential Geometry

P.M. KOUOTCHOP WAMBA, G.F. WANKAP NONO, A. NTYAM
Prolongations of G-structures related to Weil bundles and some applications
Extracta Math. 37(1) (2022), 111-138    [doi:10.17398/2605-5686.37.1.111]

Metric Spaces

J. CABELLO SÁNCHEZ
Order isomorphisms between bases of topologies
Extracta Math. 37(1) (2022), 139-151    [doi:10.17398/2605-5686.37.1.139]

	EXTRACTA MATHEMATICAE
	Vol. 36, Num. 2 (2021)

Banach Space Theory

L. DREWNOWSKI
Rosenthal l_∞-theorem revisited
Extracta Math. 36(2) (2021), 147-155    [doi:10.17398/2605-5686.36.2.147]

Category Theory

P. GAUCHER
Homotopy theory of Moore flows (II)
Extracta Math. 36(2) (2021), 157-239    [doi:10.17398/2605-5686.36.2.157]

Convex Geometry

V. SOLTAN
Support and separation properties of convex sets in finite dimension
Extracta Math. 36(2) (2021), 241-278    [doi:10.17398/2605-5686.36.2.241]

Differential Geometry

P.M. KOUOTCHOP WAMBA, G.F. WANKAP NONO
Characterization of symplectic forms induced by some tangent G-structures of higher order
Extracta Math. 36(2) (2021), 279-288    [doi:10.17398/2605-5686.36.2.279]

	EXTRACTA MATHEMATICAE
	Vol. 36, Num. 1 (2021)

Algebra

S. ATTAN
Structure and bimodules of simple Hom-alternative algebras
Extracta Math. 36(1) (2021), 1-24    [doi:10.17398/2605-5686.36.1.1]

K. SCHREMPF
Free (rational) derivation
Extracta Math. 36(1) (2021), 25-50    [doi:10.17398/2605-5686.36.1.25]

H.M. MOHAMMED SALIH
Hurwitz components of groups with socle PSL(3,q)
Extracta Math. 36(1) (2021), 51-62    [doi:10.17398/2605-5686.36.1.51]

Operator Theory

A. BEN ALI, M. BOUDHIEF, N. MOALLA
Stability of some essential B-spectra of pencil operators and application
Extracta Math. 36(1) (2021), 63-80    [doi:10.17398/2605-5686.36.1.63]

Convex Geometry

V. SOLTAN
Cone asymptotes of convex sets
Extracta Math. 36(1) (2021), 81-98    [doi:10.17398/2605-5686.36.1.81]

Differential Geometry

S. ANASTASSIOU, I. CHRYSIKOS
Ancient solutions of the homogenous Ricci flow on flag manifolds
Extracta Math. 36(1) (2021), 99-145    [doi:10.17398/2605-5686.36.1.99]

	EXTRACTA MATHEMATICAE
	Vol. 35, Num. 2 (2020)

Banach Spaces and Operator Theory

SUNG GUEN KIM
Extreme and exposed points of L(ⁿl²_∞) and L_s(ⁿl²_∞)
Extracta Math. 35(2) (2020), 127-135    [doi:10.17398/2605-5686.35.2.127]

V. AGNIEL
Unitary skew-dilations of Hilbert space operators
Extracta Math. 35(2) (2020), 137-184    [doi:10.17398/2605-5686.35.2.137]

A.J. WROBEL
Mackey continuity of convex functions on dual Banach spaces: a review
Extracta Math. 35(2) (2020), 185-195    [doi:10.17398/2605-5686.35.2.185]

M.I. GIL'
On angular localization of spectra of perturbed operators
Extracta Math. 35(2) (2020), 197-204    [doi:10.17398/2605-5686.35.2.197]

M. BABAHMED, A. EL ASRI
Invariant subspace problem and compact operators on non-Archimedean Banach spaces
Extracta Math. 35(2) (2020), 205-220    [doi:10.17398/2605-5686.35.2.205]

Real Functions and Measure Theory

A. CIMA, A. GASULL, F. MAÑOSAS
Around some extensions of Casas-Alvero conjecture for non-polynomial functions
Extracta Math. 35(2) (2020), 221-228    [doi:10.17398/2605-5686.35.2.221]

A. SAMTI
Multifractal formalism of an inhomogeneous multinomial measure with various parameters
Extracta Math. 35(2) (2020), 229-252    [doi:10.17398/2605-5686.35.2.229]

	EXTRACTA MATHEMATICAE
	Vol. 35, Num. 1 (2020)

Operator Theory

M. GARAYEV, F. BOUZEFFOUR, M. GÜRDAL, C.M. YANGÖZ
Refinements of Kantorovich type, Schwarz and Berezin number inequalities
Extracta Math. 35(1) (2020), 1-20    [doi:10.17398/2605-5686.35.1.1]

Function Theory

A. SOFO
Identities in the spirit of Euler
Extracta Math. 35(1) (2020), 21-34    [doi:10.17398/2605-5686.35.1.21]

D. VAMSHEE KRISHNA, D. SHALINI
On H₃(1) Hankel determinant for certain subclass of analytic functions
Extracta Math. 35(1) (2020), 35-42    [doi:10.17398/2605-5686.35.1.35]

Commutative Algebra

S.C. LEE, R. VARMAZYAR
A remark on prime ideals
Extracta Math. 35(1) (2020), 43-54    [doi:10.17398/2605-5686.35.1.43]

A. TARIZADEH
On the projectivity of finitely generated flat modules
Extracta Math. 35(1) (2020), 55-67    [doi:10.17398/2605-5686.35.1.55]

Non-Associative Rings and Algebras

S. ATTAN, H. HOUNNON, B. KPAMEGAN
Hom-Jordan and Hom-alternative bimodules
Extracta Math. 35(1) (2020), 69-97    [doi:10.17398/2605-5686.35.1.69]

S. MABROUK, A. MAKHLOUF, S. MASSOUD
Generalized representations of 3-Hom-Lie algebras
Extracta Math. 35(1) (2020), 99-126    [doi:10.17398/2605-5686.35.1.99]

	EXTRACTA MATHEMATICAE
	Vol. 34, Num. 2 (2019)

Banach Spaces

R.M. CAUSEY
The ξ,ζ-Dunford Pettis property
Extracta Math. 34(2) (2019), 135-200    [doi:10.17398/2605-5686.34.2.135]

S.S. DRAGOMIR
Hypo-q-norms on cartesian products of algebras of bounded linear operators on Hilbert spaces
Extracta Math. 34(2) (2019), 201-235    [doi:10.17398/2605-5686.34.2.201]

Topology

HELA LOTFI
The μ-topological Hausdorff dimension
Extracta Math. 34(2) (2019), 237-254    [doi:10.17398/2605-5686.34.2.237]

Differential Geometry

SUNIL KUMAR YADAV
Ricci solitons on para-Kähler manifolds
Extracta Math. 34(2) (2019), 255-268    [doi:10.17398/2605-5686.34.2.255]

ISMAIL LARAIEDH
aff(1|1)-trivial deformations of aff(2|1)-modules of weighted densities on the superspace R^1|2
Extracta Math. 34(2) (2019), 269-283    [doi:10.17398/2605-5686.34.2.269]

Real Functions

B. MEFTAH, M. MERAD, A. SOUAHI
Fractional Ostrowski type inequalities for functions whose derivatives are s-preinvex
Extracta Math. 34(2) (2019), 285-301    [doi:10.17398/2605-5686.34.2.285]

	EXTRACTA MATHEMATICAE
	Vol. 34, Num. 1 (2019)

Geometry of Banach Spaces

S. DUTTA, C.R. JAYANARAYANAN, D. KHURANA
Ideal operators and relative Godun sets
Extracta Math. 34(1) (2019), 1-17    [doi:10.17398/2605-5686.34.1.1]

M. GHANDEHARI, H. MARTINI
On self-circumferences in Minkowski planes
Extracta Math. 34(1) (2019), 19-28    [doi:10.17398/2605-5686.34.1.19]

Operator Theory

A. AMMAR, A. JERIBI, K. MAHFOUDHI
Browder essential approximate pseudospectrum and defect pseudospectrum on a Banach space
Extracta Math. 34(1) (2019), 29-40    [doi:10.17398/2605-5686.34.1.29]

S.S. DRAGOMIR
Upper and lower bounds for the difference between the weighted arithmetic and harmonic operator means
Extracta Math. 34(1) (2019), 41-60    [doi:10.17398/2605-5686.34.1.41]

Associative Rings and Algebras

B.L. MACEDO FERREIRA
Additivity of elementary maps on gamma rings
Extracta Math. 34(1) (2019), 61-76    [doi:10.17398/2605-5686.34.1.61]

DRISS AIAT HADJ AHMED
Non-additive Lie centralizer of strictly upper triangular matrices
Extracta Math. 34(1) (2019), 77-83    [doi:10.17398/2605-5686.34.1.77]

Group Theory

P.A. DOWERK, F. LE MAÎTRE
Bounded normal generation is not equivalent to topological bounded normal generation
Extracta Math. 34(1) (2019), 85-97    [doi:10.17398/2605-5686.34.1.85]

IAN STEWART
Tetrahedral chains and a curious semigroup
Extracta Math. 34(1) (2019), 99-122    [doi:10.17398/2605-5686.34.1.99]

Differential Geometry

E.L. DE LIMA, H.F. DE LIMA, E.A. LIMA JR, A.A. MEDEIROS
Characterizations of minimal hypersurfaces immersed in certain warped products
Extracta Math. 34(1) (2019), 123-134    [doi:10.17398/2605-5686.34.1.123]

	EXTRACTA MATHEMATICAE
	Vol. 33, Num. 2 (2018)

Banach Spaces

S.G. KIM
Exposed polynomials of P(²R²_h(1/2))
Extracta Math. 33(2) (2018), 127-143    [doi:10.17398/2605-5686.33.2.127]

D.M. SERRANO-RODRÍGUEZ
A note on a paper of S.G. Kim
Extracta Math. 33(2) (2018), 145-147    [doi:10.17398/2605-5686.33.2.145]

J.M.F. CASTILLO, M. CHŌ, M. GONZÁLEZ
Three-operator problems in Banach spaces
Extracta Math. 33(2) (2018), 149-165    [doi:10.17398/2605-5686.33.2.149]

Operator Theory

S.S. DRAGOMIR
Some new reverses and refinements of inequalities for relative operator entropy
Extracta Math. 33(2) (2018), 167-189    [doi:10.17398/2605-5686.33.2.167]

A. FARAH, M. MNIF
Characterization of some classes related to the class of Browder linear relations
Extracta Math. 33(2) (2018), 191-208    [doi:10.17398/2605-5686.33.2.191]

M.F. RODRÍGUEZ, B.P. DUGGAL, S.V. DJORDJEVIĆ
Moving Weyl's theorem from f(T) to T
Extracta Math. 33(2) (2018), 209-218    [doi:10.17398/2605-5686.33.2.209]

Nonassociative Rings and Algebras

R. GHANAM, M. LAMICHHANE, G. THOMPSON
Minimal matrix representations of decomposable Lie algebras of dimension less than or equal to five
Extracta Math. 33(2) (2018), 219-227    [doi:10.17398/2605-5686.33.2.219]

Harmonic Analysis

I.A. LÓPEZ P.
Sobolev spaces and potential spaces associated to Hermite polynomials expansions
Extracta Math. 33(2) (2018), 229-249    [doi:10.17398/2605-5686.33.2.229]

	EXTRACTA MATHEMATICAE
	Vol. 33, Num. 1 (2018)

Banach Spaces and Operator Theory

N.K. AGBEKO, P. SZOKOL
A generalization of the Hyers-Ulam-Aoki type stability of some Banach lattice-valued functional equation
Extracta Math. 33(1) (2018), 1-10    [doi:10.17398/2605-5686.33.1.1]

F. BEN BRAHIM, A. JERIBI, B. KRICHEN
Spectral properties for polynomial and matrix operators involving demicompactness classes
Extracta Math. 33(1) (2018), 11-32    [doi:10.17398/2605-5686.33.1.11]

S. DUTTA, D. KHURANA, A. SENSARMA
Representing matrices, M-ideals and tensor products of L₁-predual spaces
Extracta Math. 33(1) (2018), 33-50    [doi:10.17398/2605-5686.33.1.33]

S.G. KIM
The geometry of L(³l²_∞) and optimal constants in the Bohnenblust-Hille inequality for multilinear forms and polynomials
Extracta Math. 33(1) (2018), 51-66    [doi:10.17398/2605-5686.33.1.51]

Real and Complex Functions

J. ABIDI
Partial differential equations and strictly plurisubharmonic functions in several variables
Extracta Math. 33(1) (2018), 67-108    [doi:10.17398/2605-5686.33.1.67]

M. BRACAMONTE, J. MEDINA, M. VIVAS
On some inequalities for strongly reciprocally convex functions
Extracta Math. 33(1) (2018), 109-126    [doi:10.17398/2605-5686.33.1.109]

	EXTRACTA MATHEMATICAE
	Vol. 32, Num. 2 (2017)

Banach Spaces and Operator Theory

Z. GARBOUJ, H. SKHIRI
Essential g-ascent and g-descent of a closed linear relation in Hilbert spaces
Extracta Math. 32(2) (2017), 125-161   [Full text in PDF (202K)]

A. MAOUCHE
A symmetrical property of the spectral trace in Banach algebras
Extracta Math. 32(2) (2017), 163-172   [Full text in PDF (88K)]

H. MIZUGUCHI
The differences between Birkhoff and isosceles orthogonalities in Radon planes
Extracta Math. 32(2) (2017), 173-208   [Full text in PDF (336K)]

A. SEDDIK
Corrigendum to ``Moore-Penrose Inverse and Operator Inequalities'', Extracta Mathematicae 30 (2015), 29-39
Extracta Math. 32(2) (2017), 209-211   [Full text in PDF (65K)]

Topological Groups

R. BIGGS, C.C. REMSING
Invariant control systems on Lie groups: a short survey
Extracta Math. 32(2) (2017), 213-238   [Full text in PDF (174K)]

Associative Rings and Algebras

R. RAZAVI NAZARI, SH. GHALANDARZADEH
Content semimodules
Extracta Math. 32(2) (2017), 239-254   [Full text in PDF (120K)]

Differential Geometry

S. DEY, A. BHATTACHARYYA
Conformal mappings of mixed generalized quasi-Einstein manifolds admitting special vector fields
Extracta Math. 32(2) (2017), 255-273   [Full text in PDF (122K)]

	EXTRACTA MATHEMATICAE
	Vol. 32, Num. 1 (2017)

Banach Spaces and Operator Theory

I. GHENCIU
A note on some isomorphic properties in projective tensor products
Extracta Math. 32(1) (2017), 1-24   [Full text in PDF (158K)]

S.S. DRAGOMIR
Trace inequalities of Lipschitz type for power series of operators on Hilbert spaces
Extracta Math. 32(2) (2017), 25-54   [Full text in PDF (171K)]

Differential Geometry

J.G. ARAÚJO, H.F. DE LIMA, F.R. DOS SANTOS, M.A.L. VELÁSQUEZ
Characterizations of complete linear Weingarten spacelike submanifolds in a locally symmetric semi-Riemannian manifold
Extracta Math. 32(1) (2017), 55-81   [Full text in PDF (154K)]

Algebraic Topology

A. JALEEL, A. PERCY
Resolutions of cohomology algebras and other struggles with integer coefficients
Extracta Math. 32(1) (2017), 83-103   [Full text in PDF (181K)]

Real Functions

A. KASHURI, R. LIKO
Ostrowski type fractional integral inequalities for generalized (g,s,m,φ)-preinvex functions
Extracta Math. 32(1) (2017), 105-123   [Full text in PDF (132K)]

	EXTRACTA MATHEMATICAE
	Vol. 31, Num. 2 (2016)

Banach Spaces

A. MAOUCHE
Spectral rank of maximal finite-rank elements in Banach Jordan algebras
Extracta Math. 31(2) (2016), 191-121   [Full text in PDF (69K)]

M. GUPTA, D. BAWEJA
Weighted spaces of holomorphic functions on Banach spaces and the approximation property
Extracta Math. 31(2) (2016), 123-144   [Full text in PDF (159K)]

Operator Theory

E. CHAFAI, M. MNIF
Ascent and essential ascent spectrum of linear relations
Extracta Math. 31(2) (2016), 145-167   [Full text in PDF (148K)]

Convex Geometry

K. PRZESŁAWSKI, D. YOST
More indecomposable polyhedra
Extracta Math. 31(2) (2016), 169-188   [Full text in PDF (330K)]

Differential Geometry

A.YA. NARMANOV, A.S. SHARIPOV
Geometry of foliated manifolds
Extracta Math. 31(2) (2016), 189-197   [Full text in PDF (96K)]

A. DAS
On generalized Lie bialgebroids and Jacobi groupoids
Extracta Math. 31(2) (2016), 199-225   [Full text in PDF (193K)]

M.M. PRAVEENA, C.S. BAGEWADI
A study on Ricci solitons in generalized complex space form
Extracta Math. 31(2) (2016), 227-233   [Full text in PDF (82K)]

Algebraic Topology

K. BOUTAHIR, Y. RAMI
On LS-category of a family of rational elliptic spaces II
Extracta Math. 31(2) (2016), 235-250   [Full text in PDF (330K)]

	EXTRACTA MATHEMATICAE
	Vol. 31, Num. 1 (2016)

Banach Space and Operator Theory

S. BASU, T.S.S.R.K. RAO
On small combination of slices in Banach spaces
Extracta Math. 31(1) (2016), 1-10   [Full text in PDF (95K)]

A. SALHI, H. ZEROUALI
On a ρ_n-dilation of operator in Hilbert spaces
Extracta Math. 31(1) (2016), 11-23   [Full text in PDF (112K)]

A. SALARYAN, H. VAEZI
Adjoints of generalized composition operators with linear fractional symbol
Extracta Math. 31(1) (2016), 25-36   [Full text in PDF (119K)]

P. AIENA, M. GONZÁLEZ
Local spectral theory for operators R and S satisfying RSR=R²
Extracta Math. 31(1) (2016), 37-46   [Full text in PDF (97K)]

S.S. DRAGOMIR
Quasi Grüss type inequalities for complex functions defined on unit circle with applications for unitary operators in Hilbert spaces
Extracta Math. 31(1) (2016), 47-67   [Full text in PDF (135K)]

Differential Geometry

H.F. DE LIMA, A.F. DE SOUSA, F.R. DOS SANTOS, M.A.L. VELÁSQUEZ
Sharp upper estimates for the first eigenvalue of a Jacobi type operator
Extracta Math. 31(1) (2016), 69-88   [Full text in PDF (136K)]

Y. TANAKA
On the moduli space of Donaldson-Thomas instantons
Extracta Math. 31(1) (2016), 89-107   [Full text in PDF (144K)]

Complex Variable

M. FRAGOULOPOULOU, V. NESTORIDIS
A note on rational approximation with respect to metrizable compactifications of the plane
Extracta Math. 31(1) (2016), 109-117   [Full text in PDF (95K)]

	EXTRACTA MATHEMATICAE
	Vol. 30, Num. 2 (2015)

Banach Space Theory

T.A. ABRAHAMSEN
Linear extensions, almost isometries, and diameter two
Extracta Math. 30(2) (2015), 135-151   [Full text in PDF (134K)]

A. EL KINANI, L. BOUCHIKHI
Real analytic version of Lévy's theorem
Extracta Math. 30(2) (2015), 153-159   [Full text in PDF (95K)]

K. EL FAHRI, N. MACHRAFI, M. MOUSSA
Banach lattices with the positive Dunford-Pettis relatively compact property
Extracta Math. 30(2) (2015), 161-179   [Full text in PDF (128K)]

Operator Theory

B.L.M. FERREIRA
Jordan derivations on triangular matrix rings
Extracta Math. 30(2) (2015), 181-190   [Full text in PDF (88K)]

H. ZARIOUH
Preservation results for new spectral properties
Extracta Math. 30(2) (2015), 191-205   [Full text in PDF (123K)]

K. SOUILAH
On additive preservers of certain classes of algebraic operators
Extracta Math. 30(2) (2015), 207-220   [Full text in PDF (106K)]

Z. BENDAOUD, F. KORRICHI, L. MERGHNI, A. YAGOUB
Estimates of generalized Nevanlinna counting function and applications to composition operators
Extracta Math. 30(2) (2015), 221-234   [Full text in PDF (120K)]

D. ACHOUR, A. BELACEL
Virtually (r;r₁,... ,r_n;s)-nuclear multilinear operators
Extracta Math. 30(2) (2015), 235-250   [Full text in PDF (135K)]

Group Theory

J. MARTÍNEZ CARRACEDO
Powers in alternating simple groups
Extracta Math. 30(2) (2015), 251-262   [Full text in PDF (108K)]

	EXTRACTA MATHEMATICAE
	Vol. 30, Num. 1 (2015)

Banach Spaces

M. BACHIR
Remarks on isometries of products of linear spaces.
Extracta Math. 30(1) (2015), 1-13   [Full text in PDF (119K)]

M.G. LAWRENCE
Real analytic Fréchet algebras containing algebras of holomorphic functions.
Extracta Math. 30(1) (2015), 15-27   [Full text in PDF (133K)]

Operator Theory

A. SEDDIK
Moore-Penrose inverse and operator inequalities.
Extracta Math. 30(1) (2015), 29-39   [Full text in PDF (92K)]

Nonassociative Rings and Algebras

R. BIGGS, C.C. REMSING
Subspaces of real four-dimensional Lie algebras: a classification of subalgebras, ideals, and full-rank subspaces.
Extracta Math. 30(1) (2015), 41-93   [Full text in PDF (266K)]

R. GHANAM, G. THOMPSON
Minimal matrix representations of five-dimensional Lie algebras.
Extracta Math. 30(1) (2015), 95-133   [Full text in PDF (191K)]

	EXTRACTA MATHEMATICAE
	Vol. 29, Num. 1-2 (2014)

Non-Associative Rings

J.C.M. FERREIRA, B.L.M. FERREIRA, H. GUZZO JR
Jordan triple elementary maps on alternative rings.
Extracta Math. 29(1-2) (2014), 1-18   [Full text in PDF (114K)]

Real Functions

M. BRACAMONTE, J. EREÚ, J. GIMÉNEZ, N. MERENTES
Uniformly bounded superposition operators in the space of functions of bounded n-dimensional F-variation.
Extracta Math. 29(1-2) (2014), 19-33   [Full text in PDF (148K)]

Banach Space Theory

J.M.F. CASTILLO, P.L. PAPINI
Hepheastus account on Trojanski's polyhedral war.
Extracta Math. 29(1-2) (2014), 35-51   [Full text in PDF (150K)]

M. GONZÁLEZ, J. PELLO
Several open problems on Banach spaces (Castro Urdiales 2014).
Extracta Math. 29(1-2) (2014), 53-63   [Full text in PDF (108K)]

J. H'MICHANE, K. EL FAHRI, M. MOUSSA
Duality of almost limited operators.
Extracta Math. 29(1-2) (2014), 65-71   [Full text in PDF (84K)]

B. WALLIS
Constructing Banach ideals using upper l_p-estimates.
Extracta Math. 29(1-2) (2014), 73-95   [Full text in PDF (181K)]

Operator Theory and Related Topics

R. BRUZUAL, A. DE LA BARRERA, M. DOMÍNGUEZ
On positive definite kernels, related problems and applications.
Extracta Math. 29(1-2) (2014), 97-115   [Full text in PDF (118K)]

E. CHAFAI, M. MNIF
Descent and essential descent spectrum of linear relations.
Extracta Math. 29(1-2) (2014), 117-139   [Full text in PDF (147K)]

G. HERZOG, P.C. KUNSTMANN
Global asymptotic stability for semilinear equations via Thompson's metric.
Extracta Math. 29(1-2) (2014), 141-157   [Full text in PDF (126K)]

Differential Geometry

H. LEBZIOUI
Lorentzian flat lie groups admitting a timelike left-invariant killing vector field.
Extracta Math. 29(1-2) (2014), 159-166   [Full text in PDF (86K)]

G. ÖZTÜRK, A. KÜÇÜK, K. ARSLAN
Some characteristic properties of AW(k)-type curves on dual unit sphere.
Extracta Math. 29(1-2) (2014), 167-175   [Full text in PDF (105K)]

	EXTRACTA MATHEMATICAE
	Vol. 28, Num. 2 (2013)

Banach spaces and Operator Theory

T. BERMÚDEZ, M. GONZÁLEZ, J. PELLO
Several open problems in operator theory.
Extracta Math. 28(2) (2013), 149-156   [Full text in PDF (93K)]

B. BOUIKHALENE, E. ELQORACHI, A. CHARIFI
On the approximate solution of D'Alembert type equation originating from number theory.
Extracta Math. 28(2) (2013), 157-167   [Full text in PDF (98K)]

R. BRUZUAL, M. DOMÍNGUEZ, A. PÉREZ
On extension of multi-parametric local semigroups of isometric operators and some applications.
Extracta Math. 28(2) (2013), 169-195   [Full text in PDF (163K)]

G. DATT, R. AGGARWAL
On a generalization of Hankel operators via operator equations.
Extracta Math. 28(2) (2013), 197-211   [Full text in PDF (123K)]

F. LOMBARKIA, H. ZGUITTI
On the Browder's Theorem of an elementary operator.
Extracta Math. 28(2) (2013), 213-224   [Full text in PDF (105K)]

S. JAYARAMAN
A note on self-dual cones in Hilbert spaces.
Extracta Math. 28(2) (2013), 225-233   [Full text in PDF (102K)]

D. OJEDA-ARISTIZABAL
A norm for Tsirelson's Banach space.
Extracta Math. 28(2) (2013), 235-245   [Full text in PDF (111K)]

	EXTRACTA MATHEMATICAE
	Vol. 28, Num. 1 (2013)

Algebra

D. GAPARAYI, A.N. ISSA
Hom-Lie-Yamaguti structures on Hom-Leibniz algebras.
Extracta Math. 28(1) (2013), 1-12   [Abstract in PDF]   [Full text in PDF (92K)]

Complex Analysis

A. BOUCHEN, M.K. CHRAÏBI
Spectrum and numerical range of a compact set.
Extracta Math. 28(1) (2013), 13-31   [Abstract in PDF]   [Full text in PDF (133K)]

Differential Geometry

A. DE
A note on the paper ``On Invariant Submanifolds of LP-Sasakian Manifolds''.
Extracta Math. 28(1) (2013), 33-36   [Abstract in PDF]   [Full text in PDF (66K)]

Functional Analysis

R. BRUZUAL, M. DOMÍNGUEZ, J. SUÁREZ
Operator valued versions of the Radon-Nikodym Theorem and of the F. and M. Riesz Theorem.
Extracta Math. 28(1) (2013), 37-48   [Abstract in PDF]   [Full text in PDF (112K)]

D.K. GANGULY, B. BISWAS
A function on exponential convergence in a Fréchet metric space.
Extracta Math. 28(1) (2013), 49-56   [Abstract in PDF]   [Full text in PDF (95K)]

C. HE, H. MARTINI, S. WU
On bisectors for convex distance functions.
Extracta Math. 28(1) (2013), 57-76   [Abstract in PDF]   [Full text in PDF (420K)]

M. WEIGT, I. ZARAKAS
Derivations of generalized B^*-algebras.
Extracta Math. 28(1) (2013), 77-94   [Abstract in PDF]   [Full text in PDF (138K)]

Operator Theory

A. AMMAR, A. JERIBI
A characterization of the essential pseudospectra and application to a transport equation.
Extracta Math. 28(1) (2013), 95-112   [Abstract in PDF]   [Full text in PDF (133K)]

A. BOUSSEJRA, T. TAOUFIQ
Transfer operators on complex hyperbolic spaces.
Extracta Math. 28(1) (2013), 113-125   [Abstract in PDF]   [Full text in PDF (128K)]

C. CARPINTERO, O. GARCÍA, D. MUÑOZ, E. ROSAS, J. SANABRIA
Weyl type theorems for restrictions of bounded linear operators.
Extracta Math. 28(1) (2013), 127-139   [Abstract in PDF]   [Full text in PDF (104K)]

E. WOLF
Continuity of the norm of composition operators.
Extracta Math. 28(1) (2013), 141-147   [Abstract in PDF]   [Full text in PDF (95K)]

	EXTRACTA MATHEMATICAE
	Vol. 27, Num. 2 (2012)

Functional Analysis and Operator Theory

B. BOUIKHALENE, E. ELQORACHI, A. CHARIFI
Superstability of approximate cosine type functions on the monoid R².
Extracta Math. 27(2) (2012), 155-161   [Abstract in PDF]   [Full text in PDF (86K)]

R. BRUZUAL, M. DOMÍNGUEZ, Á. PADILLA
On dilation of local semigroups of contractions and some applications.
Extracta Math. 27(2) (2012), 163-173   [Abstract in PDF]   [Full text in PDF (103K)]

M. ZARRABI
The Commutant of an operator with bounded conjugation orbits and C₀-contractions.
Extracta Math. 27(2) (2012), 175-185   [Abstract in PDF]   [Full text in PDF (116K)]

Complex Function Theory

A. TOTOI
Integral operators on some classes of meromorphic close-to-convex multivalent functions.
Extracta Math. 27(2) (2012), 187-199   [Abstract in PDF]   [Full text in PDF (103K)]

Algebra

G. THOMPSON, Z. WICK
Subalgebras of gl(3,R).
Extracta Math. 27(2) (2012), 201-230   [Abstract in PDF]   [Full text in PDF (145K)]

J.C. CABELLO, M. CABRERA, E. NIETO
Semicentral idempotents in the multiplication ring of a centrally closed prime ring.
Extracta Math. 27(2) (2012), 231-244   [Abstract in PDF]   [Full text in PDF (118K)]

A. BOUARICH
Expression de la différentielle d₃ de la suite spectrale de Hochschild-Serre en cohomologie bornée réelle.
Extracta Math. 27(2) (2012), 245-300   [Abstract in PDF]   [Full text in PDF (301K)]

Geometry

P. MAJHI, U.C. DE
The structure of a class of generalized Sasakian-space-forms.
Extracta Math. 27(2) (2012), 301-308   [Abstract in PDF]   [Full text in PDF (76K)]

	EXTRACTA MATHEMATICAE
	Vol. 27, Num. 1 (2012)

Banach Space Theory

BELMESNAOUI AQZZOUZ, AZIZ ELBOUR
About a characterization of Dodds-Fremlin regarding positive compact operators.
Extracta Math. 27(1) (2012), 1-3   [Abstract in PDF]   [Full text in PDF (65K)]

JESÙS M.F. CASTILLO, MARILDA A. SIMOES
Property (V) still fails the three-space property.
Extracta Math. 27(1) (2012), 5-11   [Abstract in PDF]   [Full text in PDF (52K)]

ANDREAS FANKHÄNEL
On conics in Minkowski planes.
Extracta Math. 27(1) (2012), 13-29   [Abstract in PDF]   [Full text in PDF (37K)]

Operator Theory

GILLES CASSIER, RÉDA CHOUKRALLAH
Cyclicity results for some antianalytic Toeplitz operators acting on H^p.
Extracta Math. 27(1) (2012), 31-58   [Abstract in PDF]   [Full text in PDF (49K)]

MATHIEU CIANFARANI, JEAN-MARTIN PAOLI, JEAN-CHRISTOPHE TOMASI
Some results on automatic continuity of group representations and morphisms.
Extracta Math. 27(1) (2012), 59-74   [Abstract in PDF]   [Full text in PDF (44K)]

I. KH. MUSIN
Approximation by polynomials in a weighted space of infinitely differentiable functions with an application to hypercyclicity.
Extracta Math. 27(1) (2012), 75-90   [Abstract in PDF]   [Full text in PDF (44K)]

Geometry

ANDREW JAMES BRUCE
Odd Jacobi manifolds: general theory and applications to generalised Lie algebroids.
Extracta Math. 27(1) (2012), 91-123   [Abstract in PDF]   [Full text in PDF (51K)]

U.C. DE, AVIK DE
On some curvature properties of K-contact manifolds.
Extracta Math. 27(1) (2012), 125-134   [Abstract in PDF]   [Full text in PDF (50K)]

ANTONIO M. OLLER-MARCÉN
SU(2) and SL(2,C) representations of a class of torus knots.
Extracta Math. 27(1) (2012), 135-144   [Abstract in PDF]   [Full text in PDF (46K)]

AVIJIT SARKAR, MATILAL SEN
On invariant submanifolds of LP-Sasakian manifolds.
Extracta Math. 27(1) (2012), 145-154   [Abstract in PDF]   [Full text in PDF (44K)]

	EXTRACTA MATHEMATICAE
	Vol. 26, Num. 2 (2011)

Proceedings of Set-Theoretic Techniques in Banach Spaces,
Castro Urdiales (Cantabria, Spain), February 21--24, 2011

PRESENTATION

RAZVAN ANISCA
On the ergodicity of Banach spaces with property (H).
Extracta Math. 26(2) (2011), 165-171   [Abstract in PDF]   [Full text in PDF (87K)]

KEVIN BEANLAND, DANIEL FREEMAN
Ordinal ranks on weakly compact and Rosenthal operators.
Extracta Math. 26(2) (2011), 173-194   [Abstract in PDF]   [Full text in PDF (159K)]

VALENTIN FERENCZI, CHRISTIAN ROSENDAL
Displaying Polish groups on separable Banach spaces.
Extracta Math. 26(2) (2011), 195-233   [Abstract in PDF]   [Full text in PDF (224K)]

JOANNA GARBULIŃSKA, WIESŁAW KUBIŚ
Remarks on Gurariĭ spaces.
Extracta Math. 26(2) (2011), 235-269   [Abstract in PDF]   [Full text in PDF (210K)]

PIOTR KOSZMIDER
Some topological invariants and biorthogonal systems in Banach spaces.
Extracta Math. 26(2) (2011), 271-294   [Abstract in PDF]   [Full text in PDF (161K)]

JORDI LOPEZ-ABAD
Some problems concerning basic sequences in Banach spaces.
Extracta Math. 26(2) (2011), 295-316   [Abstract in PDF]   [Full text in PDF (161)]

GINÉS LÓPEZ PÉREZ, JOSÉ ANTONIO SOLER ARIAS
Trees and point of continuity property in Banach spaces.
Extracta Math. 26(2) (2011), 317-325   [Abstract in PDF]   [Full text in PDF (101K)]

	EXTRACTA MATHEMATICAE
	Vol. 26, Num. 1 (2011)

Functional Analysis and Operator Theory

MIROSLAV KAČENA
On sequentially right Banach spaces.
Extracta Math. 26(1) (2011), 1-27   [Abstract in PDF]   [Full text in PDF (178K)]

ÁKOS G. HORVÁTH, HORST MARTINI
Conics in normed planes.
Extracta Math. 26(1) (2011), 29-43   [Abstract in PDF]   [Full text in PDF (127K)]

M. FRAGOULOPOULOU, M. WEIGT, I. ZARAKAS
Derivations of locally convex *-algebras.
Extracta Math. 26(1) (2011), 45-60   [Abstract in PDF]   [Full text in PDF (136K)]

BOULBEBA ABDELMOUMEN, AREF JERIBI, MAHER MNIF
Invariance of the Schechter essential spectrum under polynomially compact operators perturbation.
Extracta Math. 26(1) (2011), 61-73   [Abstract in PDF]   [Full text in PDF (108K)]

JULIO C. RAMOS-FERNÁNDEZ
Composition operators between m-Bloch spaces.
Extracta Math. 26(1) (2011), 75-88   [Abstract in PDF]   [Full text in PDF (116K)]

Geometry

J. SZILASI, R.L. LOVAS, D.CS. KERTÉSZ
Several ways to a Berwald manifold - and some steps beyond.
Extracta Math. 26(1) (2011), 89-130   [Abstract in PDF]   [Full text in PDF (232K)]

Algebra

ELISABETE BARREIRO
The TKK construction of a Cheng-Kac Jordan superalgebra of characteristic 3.
Extracta Math. 26(1) (2011), 131-143   [Abstract in PDF]   [Full text in PDF (116K)]

HOSSEIN DOOSTIE, AMIN SAEIDI
On the degrees of the non-faithful irreducible characters in finite groups.
Extracta Math. 26(1) (2011), 145-151   [Abstract in PDF]   [Full text in PDF (79K)]

SH. GHALANDARZADEH, P. MALAKOOTI RAD
Torsion graph of modules.
Extracta Math. 26(1) (2011), 153-163   [Abstract in PDF]   [Full text in PDF (104K)]

	EXTRACTA MATHEMATICAE
	Vol. 25, Num. 3 (2010)

NIGEL J. KALTON, in memoriam

Proceedings of the Seventh Italian-Spanish Conference of General Topology and its Applications,
Badajoz (Spain), September 7-10, 2010.

PRESENTATION

F. BALIBREA
Studies on dendrites and the periodic-recurrent property.
Extracta Math. 25(3) (2010), 211-226   [Abstract in PDF]   [Full text in PDF (276K)]

G. BOSI
Topologies corresponding to continuous representability of preorders.
Extracta Math. 25(3) (2010), 227-237   [Abstract in PDF]   [Full text in PDF (102K)]

F. CABELLO SÁNCHEZ, J. CABELLO SÁNCHEZ
Multiplicative semigroups of Lipschitz functions.
Extracta Math. 25(3) (2010), 239-247   [Abstract in PDF]   [Full text in PDF (100K)]

I. GARRIDO, J.A. JARAMILLO, Y.C. RANGEL
Lip-density and algebras of Lipschitz functions on metric spaces.
Extracta Math. 25(3) (2010), 249-261   [Abstract in PDF]   [Full text in PDF (114K)]

D.N. GEORGIOU, A.C. MEGARITIS
On a new relative invariant covering dimension.
Extracta Math. 25(3) (2010), 263-275   [Abstract in PDF]   [Full text in PDF (106K)]

M. HUŠEK
Extension of mappings and pseudometrics.
Extracta Math. 25(3) (2010), 277-308   [Abstract in PDF]   [Full text in PDF (374K)]

S. MODENA, G. TIRONI
Compact Hausdorff pseudoradial spaces and their pseudoradial order.
Extracta Math. 25(3) (2010), 309-315   [Abstract in PDF]   [Full text in PDF (82K)]

	EXTRACTA MATHEMATICAE
	Vol. 25, Num. 2 (2010)

Functional Analysis and Operator Theory

J.M.F. CASTILLO
The hitchhiker guide to categorical Banach space theory. Part I.
Extracta Math. 25(2) (2010), 103-149   [Abstract in PDF]   [Full text in PDF (253K)]

O. GILADI, A. NAOR
Improved bounds in the scaled Enflo type inequality for Banach spaces.
Extracta Math. 25(2) (2010), 151-164   [Abstract in PDF]   [Full text in PDF (129K)]

H. GAAYA
On the numerical radius of the truncated adjoint shift.
Extracta Math. 25(2) (2010), 165-182   [Abstract in PDF]   [Full text in PDF (147K)]

Differential Geometry

R. RAMÍREZ-UCLÉS
Lattices and manifolds of classes of flat Riemannian tori.
Extracta Math. 25(2) (2010), 183-209   [Abstract in PDF]   [Full text in PDF (334K)]

	EXTRACTA MATHEMATICAE
	Vol. 25, Num. 1 (2010)

Algebra

J. CLIMENT VIDAL, J. SOLIVERES TUR
Kleisli and Eilenberg-Moore constructions as parts of biadjoint situations.
Extracta Math. 25(1) (2010), 1-61   [Abstract in PDF]   [Full text in PDF (895K)]

Measure Theory

L. BEN YOUSSEF
Multifractal formalism and inequality involving packing dimension.
Extracta Math. 25(1) (2010), 63-82   [Abstract in PDF]   [Full text in PDF (1122K)]

Operator Theory

MÜBARIZ T. KARAEV, MEHMET GÜRDAL
On the Berezin symbols and Toeplitz operators.
Extracta Math. 25(1) (2010), 83-102   [Abstract in PDF]   [Full text in PDF (259K)]

	EXTRACTA MATHEMATICAE
	Vol. 24, Num. 3 (2009)

Functional Analysis

F. FAKHFAKH, M. MNIF
Browder and semi-Browder operators and perturbation function.
Extracta Math. 24(3) (2009), 219-241   [Abstract in PDF]   [Full text in PDF (215K)]

R. LIVNI
On extreme points of the dual ball of a polyhedral space.
Extracta Math. 24(3) (2009), 243-249   [Abstract in PDF]   [Full text in PDF (175K)]

M. OUDGHIRI
Linear mapping preserving the kernel or the range of operators.
Extracta Math. 24(3) (2009), 251-258   [Abstract in PDF]   [Full text in PDF (150K)]

W.R. PACHECO
Full operators and algebras generated by invertible operators.
Extracta Math. 24(3) (2009), 259-264   [Abstract in PDF]   [Full text in PDF (149K)]

J. SUÁREZ, L. WEIS
Addendum to ``Interpolation of Banach Spaces by the γ-Method''.
Extracta Math. 24(3) (2009), 265-269   [Abstract in PDF]   [Full text in PDF (147K)]

L. VESELÝ
Convex sets without diametral pairs.
Extracta Math. 24(3) (2009), 271-280   [Abstract in PDF]   [Full text in PDF (181K)]

Algebra

SH. GHALANDARZADEH, P. MALAKOOTI RAD
Torsion graph over multiplication modules.
Extracta Math. 24(3) (2009), 281-299   [Abstract in PDF]   [Full text in PDF (216K)]

Differential Geometry

A.A. SHAIKH, S.K. HUI
On locally φ-symmetric β-Kenmotsu manifolds.
Extracta Math. 24(3) (2009), 310-316   [Abstract in PDF]   [Full text in PDF (168K)]

	EXTRACTA MATHEMATICAE
	Vol. 24, Num. 2 (2009)

Fourth Advanced Course in Complex Analysis and Operator Theory

PREFACE

C. BATTY
Unbounded operators: Functional calculus, generation, perturbations.
Extracta Math. 24(2) (2009), 99-133   [Abstract in PDF]   [Full text in PDF (289K)]

R.G. DOUGLAS
Operator Theory and Complex Geometry.
Extracta Math. 24(2) (2009), 135-165   [Abstract in PDF]   [Full text in PDF (295K)]

F.-H. VASILESCU
Subnormality and moment problems.
Extracta Math. 24(2) (2009), 167-186   [Abstract in PDF]   [Full text in PDF (228K)]

E. VESENTINI
Topics in linear isometries of function algebras. Preliminary notes.
Extracta Math. 24(2) (2009), 187-218   [Abstract in PDF]   [Full text in PDF (277K)]

	EXTRACTA MATHEMATICAE
	Vol. 24, Num. 1 (2009)

Functional Analysis

S. ALBEVERIO, SH.A. AYUPOV, K.K. KUDAYBERGENOV
Description of derivations on locally measurable operator algebras of type I.
Extracta Math. 24(1) (2009), 1-15   [Abstract in PDF]   [Full text in PDF (208K)]

S.G. KIM
The unit ball of L_s(²l_∞²).
Extracta Math. 24(1) (2009), 17-29   [Abstract in PDF]   [Full text in PDF (181K)]

H. MARTINI, S. WU
On orthocentric systems in strictly convex normed planes.
Extracta Math. 24(1) (2009), 31-45   [Abstract in PDF]   [Full text in PDF (248K)]

Algebra

P. DANCHEV
Trivial units in abelian group algebras.
Extracta Math. 24(1) (2009), 47-53   [Abstract in PDF]   [Full text in PDF (139K)]

O. LEZAMA, V. CIFUENTES, W. FAJARDO, J. MONTAÑO, M. PINTO, A. PULIDO, M. REYES
Quillen-Suslin rings.
Extracta Math. 24(1) (2009), 55-97   [Abstract in PDF]   [Full text in PDF (323K)]

	EXTRACTA MATHEMATICAE
	Vol. 23, Num. 3 (2008)

Functional Analysis and Operator Theory

N.D. CHAKRABORTY, SK. JAKER ALI
Type II-Λ-weak Radon-Nikodym property in a Banach space associated with a compact metrizable abelian group.
Extracta Math. 23(3) (2008), 201-216   [Abstract in PDF]   [Full text in PDF (201K)]

S. KUMAR, K.J. SINGH
Weighted composition operators between Besov spaces.
Extracta Math. 23(3) (2008), 217-234   [Abstract in PDF]   [Full text in PDF (208K)]

M. AMOUCH
Range, kernel orthogonality and operator equations.
Extracta Math. 23(3) (2008), 235-242   [Abstract in PDF]   [Full text in PDF (161K)]

Differential Geometry and Geometric Mechanics

R. BARTOLO, A.M. CANDELA
Normal trajectories in stationary spacetimes under the action of an external field with quadratic asymptotic behavior.
Extracta Math. 23(3) (2008), 243-253   [Abstract in PDF]   [Full text in PDF (173K)]

A. LOI, M. ZEDDA
Cartan domains and indefinite Euclidean spaces.
Extracta Math. 23(3) (2008), 255-263   [Abstract in PDF]   [Full text in PDF (169K)]

U.C. DE, A. SARKAR
On three-dimensional trans-Sasakian manifolds.
Extracta Math. 23(3) (2008), 265-277   [Abstract in PDF]   [Full text in PDF (165K)]

Commutative Algebra

S. KASJAN
On the wild rank conjecture of Han.
Extracta Math. 23(3) (2008), 279-292   [Abstract in PDF]   [Full text in PDF (206K)]

	EXTRACTA MATHEMATICAE
	Vol. 23, Num. 2 (2008)

Functional Analysis and Operator Theory

P. AIENA, M.T. BIONDI
Weyl type theorems for polaroid operators.
Extracta Math. 23(2) (2008), 103-118   [Abstract in PDF]   [Full text in PDF (193K)]

J.M.F. CASTILLO, M.A. SIMÕES
Limits and the Ext functor.
Extracta Math. 23(2) (2008), 119-130   [Abstract in PDF]   [Full text in PDF (195K)]

S. DELPECH
The set of exponents for isomorphic extensions of Hölder maps is not always closed.
Extracta Math. 23(2) (2008), 131-137   [Abstract in PDF]   [Full text in PDF (167K)]

Global Analysis and Algebraic Topology

T. GUARDIA, G. PADILLA
On the functoriality of stratified desingularizations.
Extracta Math. 23(2) (2008), 139-153   [Abstract in PDF]   [Full text in PDF (193K)]

J. KUREK, W.M. MIKULSKI
On the existence of constructions on connections by gauge bundle functors.
Extracta Math. 23(2) (2008), 155-162   [Abstract in PDF]   [Full text in PDF (166K)]

A.M. OLLER-MARCÉN
The SL(2,C) character variety of a class of torus knots.
Extracta Math. 23(2) (2008), 163-172   [Abstract in PDF]   [Full text in PDF (189K)]

Algebra

S. NAJIB
Autour d'un théorème de Stein.
Extracta Math. 23(2) (2008), 173-180   [Abstract in PDF]   [Full text in PDF (178K)]

M. RAWASHDEH, G. THOMPSON
Representations of codimension one non-abelian nilradical Lie algebras.
Extracta Math. 23(2) (2008), 181-199   [Abstract in PDF]   [Full text in PDF (213K)]

	EXTRACTA MATHEMATICAE
	Vol. 23, Num. 1 (2008)

Functional Analysis and Operator Theory

J. TALPONEN
A note on the class of superreflexive almost transitive Banach spaces.
Extracta Math. 23(1) (2008), 1-6   [Abstract in PDF]   [Full text in PDF (149K)]

H. MARTINI, S. WU
Radial projections of bisectors in Minkowski spaces.
Extracta Math. 23(1) (2008), 7-28   [Abstract in PDF]   [Full text in PDF (300K)]

B.P. DUGGAL
Perturbations of operators satisfying a local growth condition.
Extracta Math. 23(1) (2008), 29-42   [Abstract in PDF]   [Full text in PDF (212K)]

I. CHALENDAR, E. FRICAIN, D. TIMOTIN
A note on the stability of linear combinations of algebraic operators.
Extracta Math. 23(1) (2008), 43-48   [Abstract in PDF]   [Full text in PDF (154K)]

Algebra

P. DANCHEV
Trivial units in commutative group algebras.
Extracta Math. 23(1) (2008), 49-60   [Abstract in PDF]   [Full text in PDF (179K)]

Geometry and Global Analysis

J. KUREK, W.M. MIKULSKI
Lifting infinitesimal automorphisms to higher order adapted frame bundles.
Extracta Math. 23(1) (2008), 61-70   [Abstract in PDF]   [Full text in PDF (179K)]

A.A. SHAIKH, T. BASU, S. EYASMIN
On the existence of Φ-recurrent (LCS)_n-manifolds.
Extracta Math. 23(1) (2008), 71-83   [Abstract in PDF]   [Full text in PDF (173K)]

A. SAKOVICH
Invariant metric f-structures on specific homogeneous reductive spaces.
Extracta Math. 23(1) (2008), 85-102   [Abstract in PDF]   [Full text in PDF (223K)]

	EXTRACTA MATHEMATICAE
	Vol. 22, Num. 3 (2007)

Functional Analysis and Operator Theory

DRISSI, D.
The single-valued extension property and subharmonicity.
Extracta Math. 22(3) (2007), 235-244   [Abstract in PDF]   [Full text in PDF (167K)]

KUMAR, S., SINGH, K.J.
Weighted composition operators on weighted Bergman spaces.
Extracta Math. 22(3) (2007), 245-256   [Abstract in PDF]   [Full text in PDF (173K)]

SOFI, M.A.
Structural properties of Banach and Fréchet spaces determined by the range of vector measures.
Extracta Math. 22(3) (2007), 257-296   [Abstract in PDF]   [Full text in PDF (309K)]

Geometry and Global Analysis

MIKULSKI, W.M.
On the existence of prolongations of connections by bundle functors.
Extracta Math. 22(3) (2007), 297-314   [Abstract in PDF]   [Full text in PDF (218K)]

Algebra

SANEBLIDZE, S.
On derived categories and derived functors.
Extracta Math. 22(3) (2007), 315-324   [Abstract in PDF]   [Full text in PDF (177K)]

SANTOS, J.C.
When is a group homomorphism a covering homomorphism?
Extracta Math. 22(3) (2007), 325-330   [Abstract in PDF]   [Full text in PDF (146K)]

	EXTRACTA MATHEMATICAE
	Vol. 22, Num. 2 (2007)

Proceedings of   "Banach space theory: classical topics and new directions, Cáceres 2006".
(Satellite conference of the World Congress ICM2006, Madrid 2006)
  [Preface and list of participants in PDF (897K)]

BANDYOPADHYAY, P., ROY, A.K.,
Uniqueness of invariant Hahn-Banach extensions.
Extracta Math. 22(2) (2007), 93-114   [Abstract in PDF]   [Full text in PDF (228K)]

BASTERO, J., BERNUÉS, J.,
Gaussian behaviour and average of marginals for convex bodies.
Extracta Math. 22(2) (2007), 115-126   [Abstract in PDF]   [Full text in PDF (211K)]

BOMBAL, F.,
Continuous multilinear operators on C(K) spaces and polymeasures.
Extracta Math. 22(2) (2007), 127-146   [Abstract in PDF]   [Full text in PDF (251K)]

CABALLERO, J., HARJANI, J., LÓPEZ, B.L., SADARANGANI, K.,
Solvability of a recursive functional equation in the sequence Banach space.
Extracta Math. 22(2) (2007), 147-155   [Abstract in   [Full text in PDF (158K)]

ÇALIŞKAN, E.,
The bounded approximation property for weakly uniformly continuous type holomorphic mappings.
Extracta Math. 22(2) (2007), 157-177   [Abstract in PDF]   [Full text in PDF (256K)]

GODEFROY, G., KALTON, N.J.,
Isometric embeddings and universal spaces.
Extracta Math. 22(2) (2007), 179-189   [Abstract in PDF]   [Full text in PDF (165K)]

GONZÁLEZ, M., MARTÍNEZ-ABEJÓN, A., PELLO, J.,
On operators that preserve the Radon-Nikodým property.
Extracta Math. 22(2) (2007), 191-196   [Abstract in PDF]   [Full text in PDF (160K)]

ORIHUELA, J.,
Topological open problems in the geometry of Banach spaces.
Extracta Math. 22(2) (2007), 197-213   [Abstract in PDF]   [Full text in PDF (205K)]

PERALTA, A.M.,
Topological characterization of weakly compact operators revisited.
Extracta Math. 22(2) (2007), 215-223   [Abstract in PDF]   [Full text in PDF (173K)]

TALPONEN, J.,
On weakly extremal structures in Banach spaces.
Extracta Math. 22(2) (2007), 225-233   [Abstract in PDF]   [Full text in PDF (173K)]

	EXTRACTA MATHEMATICAE
	Vol. 22, Num. 1 (2007)

Functional Analysis and Operator Theory

INDUMATHI, V., LALITHAMBIGAI, S., LIN, B.-L.
Ball proximinality of closed * subalgebras in C(Q).
Extracta Math. 22(1) (2007), 1-17   [Abstract in PDF]   [Full text in PDF (204K)]

MATACHE, V.
Distances between composition operators.
Extracta Math. 22(1) (2007), 19-33   [Abstract in PDF]   [Full text in PDF (204K)]

VERLIAT, J.
Regularity problem for extremal vectors.
Extracta Math. 22(1) (2007), 35-43   [Abstract in PDF]   [Full text in PDF (179K)]

MBEKHTA, M.
Linear maps preserving the generalized spectrum.
Extracta Math. 22(1) (2007), 45-54   [Abstract in PDF]   [Full text in PDF (177K)]

ARIAS, M.L., CORACH, G., PACHECO, M.
Characterization of Bessel sequences.
Extracta Math. 22(1) (2007), 55-66   [Abstract in PDF]   [Full text in PDF (189K)]

Commutative and non-Commutative Algebra

DE LA PEÑA, J.A., SKOWROŃSKI, A.
Substructures of algebras with weakly non-negative Tits form.
Extracta Math. 22(1) (2007), 67-81   [Abstract in PDF]   [Full text in PDF (228K)]

DARAFSHEH, M.R., SHARIFI, H.
Sylow 2-subgroups of solvable Q-groups.
Extracta Math. 22(1) (2007), 83-91   [Abstract in PDF]   [Full text in PDF (172K)]

	EXTRACTA MATHEMATICAE
	Vol. 21, Num. 3 (2006)

Algebra

HAJDUK, A.
A New Proof of Gabriel's Lemma.
Extracta Math. 21(3) (2006), 191-195   [Full text in PDF (152K)]

ALBEVERIO, S., OMIROV, B.A., RAKHIMOV, I.S.
Classification of 4-dimensional nilpotent complex Leibniz algebras.
Extracta Math. 21(3) (2006), 197-210   [Full text in PDF (162K)]

HUANG, W.
Tensor product and local interior G-algebras.
Extracta Math. 21(3) (2006), 211-220   [Abstract in PDF]   [Full text in PDF (171K)]

Functional Analysis and Operator Theory

SUCIU, L.
Some Invariant subspaces for A-contractions and applications.
Extracta Math. 21(3) (2006), 221-247   [Abstract in PDF]   [Full text in PDF (230K)]

KUMAR, R., SINGH, K.J.
Essential norm of weighted composition operators on the Dirichlet space.
Extracta Math. 21(3) (2006), 249-259   [Abstract in PDF]   [Full text in PDF (166K)]

BEL HADJ FREDJ, O.
Essential descent spectrum and commuting compact perturbations.
Extracta Math. 21(3) (2006), 261-271   [Full text in PDF (162K)]

Global Analysis

MIKULSKI, W.M.
Prolongation of linear semibasic tangent valued forms to product preserving gauge bundles of vector bundles.
Extracta Math. 21(3) (2006), 273-286   [Abstract in PDF]   [Full text in PDF (179K)]

	EXTRACTA MATHEMATICAE
	Vol. 21, Num. 2 (2006)

Functional Analysis and Operator Theory

BOASSO, E.
On the Moore-Penrose inverse in C^*-algebras.
Extracta Math. 21(2) (2006), 93-106   [Abstract in PDF]   [Full text in PDF (157K)]

BER, A.F., CHILIN, V.I., SUKOCHEV, F.A.
Non-trivial derivations on commutative regular algebras.
Extracta Math. 21(2) (2006), 107-147   [Abstract in PDF]   [Full text in PDF (297K)]

AMOUCH, M.
A note on the range of generalized derivation.
Extracta Math. 21(2) (2006), 149-157   [Abstract in PDF]   [Full text in PDF (156K)]

Global Analysis and Differential Geometry

KUREK, J., MIKULSKI, W.M.
Canonical symplectic structures on the r-th order tangent bundle of a symplectic manifold.
Extracta Math. 21(2) (2006), 159-166   [Abstract in PDF]   [Full text in PDF (153K)]

LLIBRE, J., PESSOA, C.
Homogeneous polynomial vector fields of degree 2 on the 2--dimensional sphere.
Extracta Math. 21(2) (2006), 167-190   [Abstract in PDF]   [Full text in PDF (286K)]

	EXTRACTA MATHEMATICAE
	Vol. 21, Num. 1 (2006)

Functional Analysis and Operator Theory

ARISTOV, O.Y.
Projective covers of finitely generated Banach modules and the structure of some Banach algebras.
Extracta Math. 21(1) (2006), 1-26   [Full text in PDF (233K)]

DUTTA, S., FONF, V.P.
On Tauberian and co-Tauberian operators.
Extracta Math. 21(1) (2006), 27-39   [Abstract in PDF]   [Full text in PDF (185K)]

OUDGHIRI, M.
a-Weyl's theorem and the single valued extension property.
Extracta Math. 21(1) (2006), 41-50   [Full text in PDF (247K)]

AMOUCH, M.
Generalized a-Weyl's theorem and the single-valued extension property.
Extracta Math. 21(1) (2006), 51-65   [Abstract in PDF]   [Full text in PDF (188K)]

Global Analysis and Functional Equations

AKKOUCHI, M., BAKALI, A., BOUIKHALENE, B., ELQORACHI, E.
On generalized d'Alembert functional equation.
Extracta Math. 21(1) (2006), 67-82   [Abstract in PDF]   [Full text in PDF (189K)]

BAHROUN, F., BHOURI, I.
Multifractals and projections.
Extracta Math. 21(1) (2006), 83-91   [Abstract in PDF]   [Full text in PDF (164K)]

	EXTRACTA MATHEMATICAE
	Vol. 20, Num. 3 (2005)

Commutative Algebra

ROTKIEWICZ, M.
Cohomology ring of n-Lie algebras.
Extracta Math. 20(3) (2005), 219-232   [Abstract in PDF]   [Full text in PDF (215K)]

DANCHEV, P.V.
Warfield invariants in Abelian group rings.
Extracta Math. 20(3) (2005), 233-241   [Abstract in PDF]   [Full text in PDF (170K)]

Functional Analysis and Operator Theory

KALENDA, O.F.K.
Complex Banach spaces with Valdivia dual unit ball.
Extracta Math. 20(3) (2005), 243-259   [Abstract in PDF]   [Full text in PDF (240K)]

MORILLON, M.
A new proof of James' Sup Theorem.
Extracta Math. 20(3) (2005), 261-271   [Abstract in PDF]   [Full text in PDF (211K)]

SENLIN, W., DONGHAI, J., ALONSO, J.
Metric ellipses in Minkowski planes.
Extracta Math. 20(3) (2005), 273-280   [Abstract in PDF]   [Full text in PDF (365K)]

SCHMOEGER, C.
On a question of Mbekhta.
Extracta Math. 20(3) (2005), 281-290   [Abstract in PDF]   [Full text in PDF (161K)]

Differential Geometry and Algebraic Topology

TSHIKUNA-MATAMBA, T.
Almost contact metric submersions and curvature tensors.
Extracta Math. 20(3) (2005), 291-306   [Abstract in PDF]   [Full text in PDF (179K)]

BOUARICH, A.
Suites spectrales de Hochschild-Serre à coefficients dans un espace semi-normé.
Extracta Math. 20(3) (2005), 307-340   [Abstract in PDF]   [Full text in PDF (322K)]

	EXTRACTA MATHEMATICAE
	Vol. 20, Num. 2 (2005)

Algebra

BAUES, H.-J., PIRASHVILI, T.
Spaces associated to quadratic endofunctors of the category of groups.
Extracta Math. 20(2) (2005), 99-136   [Abstract in PDF]   [Full text in PDF (2148K)]

KASJAN, S., DE LA PEÑA, J.A.
Galois coverings and the problem of axiomatization of the representation type of algebras.
Extracta Math. 20(2) (2005), 137-150   [Full text in PDF (225K)]

GHANAM, R., STRUGAR, I., THOMPSON, G.
Matrix representations for low dimensional Lie algebras.
Extracta Math. 20(2) (2005), 151-184   [Full text in PDF (246K)]

Functional Analysis

CASTILLO, J.M.F., GARCÍA, R.
L-sets and the Pełczyński-Pitt Theorem.
Extracta Math. 20(2) (2005), 185-197   [Full text in PDF (206K)]

HALBEISEN, L.
Families of almost disjoint Hamel bases.
Extracta Math. 20(2) (2005), 199-202   [Abstract in PDF]   [Full text in PDF (136K)]

Operator Theory

Duggal, B.P.
Hereditarily normaloid operators.
Extracta Math. 20(2) (2005), 203-217   [Abstract in PDF]   [Full text in PDF (230K)]

	EXTRACTA MATHEMATICAE
	Vol. 20, Num. 1 (2005)

Non-Commutative Algebra

CAMACHO, L.M., GÓMEZ, J.R., GONZÁLEZ, A.J.
About a family of naturally graded no p-filiform Lie algebras.
Extracta Math. 20(1) (2005), 1-12   [Abstract in PDF]   [Full text in PDF (176K)]

Differential Equations

HERZOG, G., LEMMERT, R.
On BVPs in l^∞(A).
Extracta Math. 20(1) (2005), 13-23   [Abstract in PDF]   [Full text in PDF (170K)]

Functional Analysis

AIENA, P., CARPINTERO, C.
Weyl's theorem, a-Weyl's theorem and single-valued extension property.
Extracta Math. 20(1) (2005), 25-41   [Abstract in PDF]   [Full text in PDF (197K)]

MEDKOVÁ, D.
Conditions ensuring T^-1(Y)⊂Y.
Extracta Math. 20(1) (2005), 43-50   [Abstract in PDF]   [Full text in PDF (152K)]

MASLYUCHENKO, V.K., PLICHKO, A.M., (EDITORS)
Some open problems on functional analysis and function theory.
Extracta Math. 20(1) (2005), 51-70   [Full text in PDF (227K)]

Statistics

NAKAMORI, S., HERMOSO, A., JIMÉNEZ, J., LINARES, J.
Filtering of signals transmitted in multichannel from Chandrasekhar and Riccati recursions.
Extracta Math. 20(1) (2005), 71-85   [Abstract in PDF]   [Full text in PDF (209K)]

Mechanics

PASQUERO, S.
On Carnot's theorem in time dependent impulsive mechanics.
Extracta Math. 20(1) (2005), 87-97   [Abstract in PDF]   [Full text in PDF (156K)]

	EXTRACTA MATHEMATICAE
	Vol. 19, Num. 3 (2004)

Differential Equations

DALMAGRO F.
Equivariant unfoldings of G-stratified pseudomanifolds.
Extracta Math. 19(3) (2004), 289-311   [Abstract in PDF]   [Full text in PDF (242K)]

Functional Analysis

AQZZOUZ, B., NOUIRA, R.
Les topologies σ-Lebesgue sur C(X).
Extracta Math. 19(3) (2004), 313-316   [Abstract in PDF]   [Full text in PDF (138K)]

BALLICO, E.
An example of a Banach space V such that all the degree ≥ d hypersurfaces of P(V) are singular.
Extracta Math. 19(3) (2004), 317-318   [Abstract in PDF]   [Full text in PDF (100K)]

RAO, T.S.S.R.K.
Some generalizations of Kadison's theorem: a Survey.
Extracta Math. 19(3) (2004), 319-334   [Abstract in PDF]   [Full text in PDF (201K)]

CABELLO SÁNCHEZ, F.
On continuous surjections from Cantor set.
Extracta Math. 19(3) (2004), 335-337   [Abstract in PDF]   [Full text in PDF (117K)]

Differential Geometry

ROMERO, A., SUH, Y.J.
Differential geometry of indefinite complex submanifolds in indefinite complex space forms.
Extracta Math. 19(3) (2004), 339-398   [Full text in PDF (368K)]

Statistics

NAKAMORI, S., CABALLERO, R., HERMOSO, A., JIMÉNEZ, J., LINARES, J.
Quadratic estimation from non-independent uncertain observations with coloured noise.
Extracta Math. 19(3) (2004), 399-413   [Abstract in PDF]   [Full text in PDF (219K)]

	EXTRACTA MATHEMATICAE
	Vol. 19, Num. 2 (2004)

Number Theory

SLINKO, A.
1, 2, 4, 8,... what comes next?
Extracta Math. 19(2) (2004), 155-161   [Full text in PDF (135K)]

Functional Analysis

AMEZIANE HASSANI, R., BLALI, A., BOUZIANI, A.
Théorème du graphe fermé dans les G-espaces topologiques.
Extracta Math. 19(2) (2004), 163-170   [Full text in PDF (159K)]

AZAGRA, D., MONTESINOS, A.
Starlike bodies and deleting diffeomorphisms in Banach spaces.
Extracta Math. 19(2) (2004), 171-213   [Full text in PDF (310K)]

CHIL, E.
On Riesz homomorphisms in von Neumann regular f-Algebra.
Extracta Math. 19(2) (2004), 215-226   [Full text in PDF (158K)]

CHOUKRI, R.
Algèbres topologiques algébriques.
Extracta Math. 19(2) (2004), 227-231   [Full text in PDF (132K)]

EL HARTI, R.
Quelques remarques sur les opérateurs et les q-algèbres de Banach.
Extracta Math. 19(2) (2004), 233-241   [Full text in PDF (146K)]

LIU, L.
Boundedness for multilinear Littlewood-Paley operators on Hardy and Herz-Hardy spaces.
Extracta Math. 19(2) (2004), 243-255   [Full text in PDF (181K)]

MAOUCHE, A.
Diagonalization in Banach algebras and Jordan-Banach algebras.
Extracta Math. 19(2) (2004), 257-260   [Full text in PDF (126K)]

PAPINI, P.L.
Equilateral, diametral, centered sets and subsets of spheres.
Extracta Math. 19(2) (2004), 261-267   [Full text in PDF (147K)]

Lie Groups

BENJUMEA, J.C., ECHARTE, F.J., NÚÑEZ, J., TENORIO, A.F.
An obstruction to represent Abelian Lie algebras by unipotent matrices.
Extracta Math. 19(2) (2004), 269-277   [Full text in PDF (161K)]

Statistics

NASROALLAH, A.
Monte Carlo simulation of Markov chain steady-state distribution.
Extracta Math. 19(2) (2004), 279-288   [Full text in PDF (183K)]

	EXTRACTA MATHEMATICAE
	Vol. 19, Num. 1 (2004)

V Curso sobre Espacios de Banach y Operadores
Laredo, Cantabria (Spain)
25-28 Agosto de 2003

Presentación / Preface

Lectures

DOMÍNGUEZ BENAVIDES, T., JAPÓN PINEDA, M.A.
Non-expansive mappings in spaces of continuous functions.
Extracta Math. 19(1) (2004), 1-20   [Full text in PDF (213K)]

JARCHOW, H.
Special operators on classical spaces of analytic functions.
Extracta Math. 19(1) (2004), 21-53   [Full text in PDF (306K)]

GRANERO, A.S., JIMÉNEZ-SEVILLA, M., MORENO, J.P.
Intersections of closed balls and geometry of Banach spaces.
Extracta Math. 19(1) (2004), 55-92   [Full text in PDF (300K)]

ODELL, E.
Ordinal indices in Banach spaces.
Extracta Math. 19(1) (2004), 93-125   [Full text in PDF (293K)]

Communications

AIZPURU, A., GUTIÉRREZ-DÁVILA, A., SALA, A.
On the convergence and unconditionally convergence of series of operators on Banach spaces.
Extracta Math. 19(1) (2004), 127-130   [Full text in PDF (129K)]

AIZPURU, A., GARCÍA-PACHECO, F.J.
On convexity, smoothness and renormings in the study of faces of the unit ball of a Banach space.
Extracta Math. 19(1) (2004), 131-134   [Full text in PDF (126K)]

GONZÁLEZ, M., MARTÍNEZ-ABEJÓN, A., PELLO GARCÍA, J.
Representation of operators with martingales and the Radon-Nikodým property.
Extracta Math. 19(1) (2004), 135-140   [Full text in PDF (144K)]

LAJARA, S., PALLARÉS, A.J.
Renorming and operators.
Extracta Math. 19(1) (2004), 141-144   [Full text in PDF (26K)]

LEÓN SAAVEDRA, F.
The positive supercyclicity theorem.
Extracta Math. 19(1) (2004), 145-149   [Full text in PDF (129K)]

MARTÍN, M., MERÍ, J., RODRÍGUEZ-PALACIOS, Á.
Finite-dimensional Banach spaces with numerical index zero.
Extracta Math. 19(1) (2004), 151-153   [Full text in PDF (132K)]

	EXTRACTA MATHEMATICAE
	Vol. 18, Num. 3 (2003)

Differential Equations

CALVO JURADO, C., CASADO DÍAZ, J.
Results on existence of solution for an optimal design problem.
Extracta Math. 18(3) (2003), 263-271   [Full text in PDF (161K)]

Differential Geometry

RUBIO RUIZ, R.M.
Estudio de las variedades de contacto compactas que admiten una acción foliante.
Extracta Math. 18(3) (2003), 273-288   [Full text in PDF (204K)]

Functional Analysis

AQZZOUZ, B.
Caractérisations des b-espaces libres.
Extracta Math. 18(3) (2003), 289-295   [Full text in PDF (135K)]

BRITS, R.M., LINDEBOOM, L., RAUBENHEIMER, H.
On the structure of rank one elements in Banach algebras.
Extracta Math. 18(3) (2003), 297-309   [Full text in PDF (181K)]

PLICHKO, A., WÓJTOWICZ, M.
Note on a Banach space having equal linear dimension with its second dual.
Extracta Math. 18(3) (2003), 311-314   [Full text in PDF (136K)]

MEDINA GALEGO, E., PLICHKO, A.
On Banach spaces containing complemented and uncomplemented subspaces isomorphic to c ₀.
Extracta Math. 18(3) (2003), 315-319   [Full text in PDF (149K)]

Probability Theory and Stochastic Processes

HULL, D.M.
A survey of the literature associated with the bisexual Galton-Watson branching process.
Extracta Math. 18(3) (2003), 321-343   [Full text in PDF (195K)]

	EXTRACTA MATHEMATICAE
	Vol. 18, Num. 2 (2003)

Differential Equations

DELGADO-TÉLLEZ, M., IBORT, A.
A panorama of geometrical optimal control theory.
Extracta Math. 18(2) (2003), 129-151   [Full text in PDF (197K)]

FRANCO, D., NIETO, J.J., O'REGAN, D.
Upper and lower solutions for first order problems with nonlinear boundary conditions.
Extracta Math. 18(2) (2003), 153-160   [Full text in PDF (133K)]

Functional Analysis

BANDYOPADHYAY, P., BASU, S., DUTTA, S., LIN, B.-L.
Very non-constrained subspaces of Banach spaces.
Extracta Math. 18(2) (2003), 161-185   [Full text in PDF (238K)]

AMEZIANE HASSANI, R., BABAHMED, M., EL YOUSSEFI, J.
FK-espaces contenant c ₀ en analyse non-archimédienne.
Extracta Math. 18(2) (2003), 187-200   [Full text in PDF (197K)]

AVERKOV, G.
On cross-section measures in Minkowski spaces.
Extracta Math. 18(2) (2003), 201-208   [Full text in PDF (147K)]

CASTILLO, J.M.F., SIMOES, M.A.
On p-summable sequences in locally convex spaces.
Extracta Math. 18(2) (2003), 209-222   [Full text in PDF (191K)]

Topology

PADILLA, G.
On normal stratified pseudomanifolds.
Extracta Math. 18(2) (2003), 223-234   [Full text in PDF (194K)]

CHARATONIK, J.J.
Recent research in hyperspace theory.
Extracta Math. 18(2) (2003), 235-262   [Full text in PDF (226K)]

	EXTRACTA MATHEMATICAE
	Vol. 18, Num. 1 (2003)

Differential Equations

BENCHOHRA, M., NTOUYAS, S.K.
Existence results for multivalued semilinear functional differential equations.
Extracta Math. 18(1) (2003), 1-12   [Full text in PDF (164K)]

ELLABIB, A., NACHAOUI, A.
Unicité des solutions stationnaires des modèles dérive-diffusion avec génération d'avalanche.
Extracta Math. 18(1) (2003), 13-21   [Full text in PDF (167K)]

HERZOG, G., LEMMERT, R.
Positive solutions of systems of boundary value problems.
Extracta Math. 18(1) (2003), 23-32   [Full text in PDF (156K)]

Functional Analysis

BERNINGER, H., WERNER, D.
Lipschitz spaces and M-ideals.
Extracta Math. 18(1) (2003), 33-56   [Full text in PDF (301K)]

ECH-CHERIF EL KETTANI, M., EL BOUCHIBTI, E.
Sur les transformations additives qui conservent le spectre de surjection.
Extracta Math. 18(1) (2003), 57-64   [Full text in PDF (150K)]

KALENDA, O.
On the class of continuous images of Valdivia compacta.
Extracta Math. 18(1) (2003), 65-80   [Full text in PDF (190K)]

TOMA, A.
Commutativity criterions in locally M-convex algebras.
Extracta Math. 18(1) (2003), 81-89   [Full text in PDF (145K)]

VILLEGAS, J.
On vector-valued Hörmander-Beurling spaces.
Extracta Math. 18(1) (2003), 91-106   [Full text in PDF (261K)]

Geometrical Mechanics

MASSA, E., VIGNOLO, S.
A new geometrical framework for time-dependent Hamiltonian mechanics.
Extracta Math. 18(1) (2003), 107-118   [Full text in PDF (184K)]

Statistics

CABALLERO, R., HERMOSO, A., JIMÉNEZ, J., LINARES, J.
Filtering and fixed-point smoothing from an innovation approach in systems with uncertainty.
Extracta Math. 18(1) (2003), 119-128   [Full text in PDF (142K)]

	EXTRACTA MATHEMATICAE
	Vol. 17, Num. 3 (2002)

IV Curso sobre Espacios de Banach y Operadores
Laredo, Cantabria (Spain)
20-24 Agosto de 2001

Presentación / Preface

ARON, R.
An introduction to polynomials on Banach spaces.
Extracta Math. 17(3) (2002), 303-329   [Full text in PDF (343K)]

DOMÍNGUEZ BENAVIDES, T.
Geometric properties of Banach spaces and metric fixed point theory.
Extracta Math. 17(3) (2002), 331-349   [Full text in PDF (202K)]

GARRIDO, M.I., JARAMILLO, J.A.
Variations on the Banach-Stone theorem.
Extracta Math. 17(3) (2002), 351-383   [Full text in PDF (276K)]

ODELL, E.
Stability in Banach spaces.
Extracta Math. 17(3) (2002), 385-425   [Full text in PDF (326K)]

	EXTRACTA MATHEMATICAE
	Vol. 17, Num. 2 (2002)

Expository Papers

AZAGRA, D., JIMÉNEZ-SEVILLA, M.
Geometrical and topological properties of bumps and starlike bodies in Banach spaces.
Extracta Math. 17(2) (2002), 151-200   [Full text in PDF (479K)]

Research Papers

ZUCCA, F.
On some properties of transition operators.
Extracta Math. 17(2) (2002), 201-209   [Full text in PDF (220K)]

AAMRI, M., EL MOUTAWAKIL, D.
Quelques nouveaux théorèmes du point fixe dans les espaces topologiques de type F.
Extracta Math. 17(2) (2002), 211-219   [Full text in PDF (182K)]

CHAVARRIGA, J., SALIH, N.
On lopsided systems.
Extracta Math. 17(2) (2002), 221-238   [Full text in PDF (268K)]

CUENCA MIRA, J.A.
Moufang H*-algebras.
Extracta Math. 17(2) (2002), 239-246   [Full text in PDF (184K)]

APARICIO PEDREÑO, J.J.
Ecuaciones lineales y anillos conmutativos.
Extracta Math. 17(2) (2002), 247-257   [Full text in PDF (203K)]

IGLESIAS-PONTE, D., MARRERO, J.C.
Generalized Lie bialgebroids and strong Jacobi-Nijenhuis structures.
Extracta Math. 17(2) (2002), 259-271   [Full text in PDF (240K)]

CASTILLO, J.M.F., MORENO, Y.
König-Witstock quasi-norms on quasi-Banach spaces.
Extracta Math. 17(2) (2002), 273-280   [Full text in PDF (190K)]

INASSARIDZE, N., KHMALADZE, E., LADRA, M.
Non-Abelian tensor product of Lie algebras and its derived functors.
Extracta Math. 17(2) (2002), 281-288   [Full text in PDF (217K)]

GUTIERREZ, C., LLIBRE, J.
Darbouxian integrability for polynomial vector fields on the 2-dimensional sphere.
Extracta Math. 17(2) (2002), 289-301   [Full text in PDF (222K)]

	EXTRACTA MATHEMATICAE
	Vol. 17, Num. 1 (2002)

Research Papers

BECERRA GUERRERO, J., RODRÍGUEZ-PALACIOS, A.
Transitivity of the norm on Banach spaces.
Extracta Math. 17(1) (2002), 1-58   [Full text in PDF (502K)]

CHRAIBI KAADOUD, M.
Domaine numérique de l'opérateur produit M_2,A,B et de la dérivation généralisée δ_2,A,B.
Extracta Math. 17(1) (2002), 59-68   [Full text in PDF (226K)]

BEDNAVRÍK, D.
Uniform Gâteaux smoothness of higher order on separable Banach spaces.
Extracta Math. 17(1) (2002), 69-95   [Full text in PDF (339K)]

AAMRI, M., CHAIRA, K.
Approximation du point fixe et applications faiblement contractantes.
Extracta Math. 17(1) (2002), 97-110   [Full text in PDF (240K)]

AMEZIANE HASSANI, R., BABAHMED, M.
Espaces parfaits dans une dualité séparante sur un corps valué non-archimédien.
Extracta Math. 17(1) (2002), 111-121   [Full text in PDF (217K)]

STOUTI, A.
Fix-finite approximation property in normed vector spaces.
Extracta Math. 17(1) (2002), 123-130   [Full text in PDF (190K)]

RODRÍGUEZ-LÓPEZ, J., ROMAGUERA, S.
Graph topologies and uniform convergence in quasi-uniform spaces.
Extracta Math. 17(1) (2002), 131-140   [Full text in PDF (209K)]

MAADEN, A.
On the p-drop theorem, 1 ≤ p ≤∞.
Extracta Math. 17(1) (2002), 141-150   [Full text in PDF (210K)]

	EXTRACTA MATHEMATICAE
	Vol. 16, Num. 3 (2001)

Expository Papers

DÍAZ, J.I.,
Qualitative study of nonlinear parabolic equations: an introduction.
Extracta Math. 16(3) (2001), 303-341   [Full text in PDF (296K)]

Research Papers

KETTANI, M., BOUCHIBTI, H.
Sur les transformations additives qui conservent le spectre ponctuel.
Extracta Math. 16(3) (2001), 343-349   [Full text in PDF (141K)]

ATTIOUI, A., AZHARI, A.
Linéarisation des difféomorphismes analytiques dans une algèbre de Banach.
Extracta Math. 16(3) (2001), 351-359   [Full text in PDF (163K)]

GONZÁLEZ, M., MOLINA, M., MOTA, M.
A note on bisexual Galton-Watson branching processes with immigration.
Extracta Math. 16(3) (2001), 361-365   [Full text in PDF (144K)]

LÓPEZ MOLINA, J.A., PUERTA, M.E., RIVERA, M.J.
On the structure of ultraproducts of real interpolation spaces.
Extracta Math. 16(3) (2001), 367-382   [Full text in PDF (207K)]

VANDERPUTTEN, L.
Representation of operators defined on the space of Bochner integrable functions.
Extracta Math. 16(3) (2001), 383-391   [Full text in PDF (163K)]

DÍAZ, F.J., REMEDIOS, J., RODRÍGUEZ-MACHÍN, S.
Generalized homotopy in C-categories.
Extracta Math. 16(3) (2001), 393-403   [Full text in PDF (187K)]

GÓMEZ, J.R., JIMÉNEZ-MERCHÁN, A., REYES, J.
Álgebras de Lie filiformes de máxima longitud.
Extracta Math. 16(3) (2001), 405-421   [Full text in PDF (192K)]

SOFTOVA, L.G.
Cauchy-Neumann problem for a kind of nonlinear parabolic operators.
Extracta Math. 16(3) (2001), 423-433   [Full text in PDF (176K)]

AQZZOUZ, B., NOUIRA, R.
Sur les topologies de Lebesgue.
Extracta Math. 16(3) (2001), 435-440   [Full text in PDF (147K)]

LI, C., LI, W., LLIBRE, J., ZHANG, Z.
Polynomial systems: a lower bound for the weakened 16th Hilbert problem.
Extracta Math. 16(3) (2001), 441-447   [Full text in PDF (151K)]

	EXTRACTA MATHEMATICAE
	Vol. 16, Num. 2 (2001)

Expository Papers

ANCOCHEA, J.M., CAMPOAMOR, R.
Characteristically nilpotent Lie algebras: a survey.
Extracta Math. 16(2) (2001), 153-210   [Full text in PDF (366K)]

Research Papers

MAADEN, A.
On the C-farthest points.
Extracta Math. 16(2) (2001), 211-222   [Full text in PDF (167K)]

BARRAA, M., BOUMAZGOUR, M.
A lower bound of the norm of the operator X —> AXB+BXA.
Extracta Math. 16(2) (2001), 223-227   [Full text in PDF (147K)]

BARRAA, M., BOUMAZGOUR, M.
Norm of a derivation and hyponormal operators.
Extracta Math. 16(2) (2001), 229-233   [Full text in PDF (121K)]

GHEORGHE, L.G.
Convergence of Taylor series in Hardy and Besov spaces.
Extracta Math. 16(2) (2001), 235-239   [Full text in PDF (139K)]

THOMPSON, G., PRINCE, G.E.
The inverse problem for flat kinetic minus potential Lagrangians.
Extracta Math. 16(2) (2001), 241-248   [Full text in PDF (134K)]

KEMMOUN, H.
Théorème de Gelfand-Mazur dans les algèbres p-normées non-associatives.
Extracta Math. 16(2) (2001), 249-258   [Full text in PDF (166K)]

FABIAN, M., ZIZLER, V.
Norms that locally depend on countably many linear functionals.
Extracta Math. 16(2) (2001), 259-278   [Full text in PDF (234K)]

Research Announcements

REMEDIOS-GÓMEZ, J., RODRÍGUEZ-MACHÍN, S.
Generalized homotopy theory.
Extracta Math. 16(2) (2001), 279-285   [Full text in PDF (192K)]

DÍAZ, F.J., RODRÍGUEZ-MACHÍN, S.
Homotopy theory induced by cones.
Extracta Math. 16(2) (2001), 287-292   [Full text in PDF (155K)]

BRAVO, J.L., FERNÁNDEZ, M., TINEO, A.
The set of first-order differential equations with periodic or bounded solutions.
Extracta Math. 16(2) (2001), 293-295   [Full text in PDF (124K)]

RODRÍGUEZ-GALIANO, M.I., GONZÁLEZ-PACHÓN, J.
Characteristics of orders based on choice function tool.
Extracta Math. 16(2) (2001), 297-301   [Full text in PDF (173K)]

	EXTRACTA MATHEMATICAE
	Vol. 16, Num. 1 (2001)

Expository Papers

GODEFROY, G.
The Banach space c ₀.
Extracta Math. 16(1) (2001), 1-25   [Full text in PDF (235K)]

Research Papers

BANDYOPADHYAY, P., BASU, S.
On nicely smooth Banach spaces.
Extracta Math. 16(1) (2001), 27-45   [Full text in PDF (204K)]

DEHERI, G.M.
Some aspects of λ(P₀, N)-nuclearity.
Extracta Math. 16(1) (2001), 47-56   [Full text in PDF (179K)]

AL-SAYYAD, S.J.
Sequentially m-barrelled algebras.
Extracta Math. 16(1) (2001), 57-62   [Full text in PDF (129K)]

BENSLIMANE, M., MARHNINE, H., ZARHOUTI, C.
Modular annihilator Jordan pairs.
Extracta Math. 16(1) (2001), 63-77   [Full text in PDF (181K)]

CHOUKRI, R.
Sur certaines questions concernant les Q-algèbres.
Extracta Math. 16(1) (2001), 79-82   [Full text in PDF (116K)]

STOUTI, A.
Théorème d'approximation et espaces de Hopf.
Extracta Math. 16(1) (2001), 83-92   [Full text in PDF (166K)]

F. PRESAS, F.
Newton's methods from a geometric point of view.
Extracta Math. 16(1) (2001), 93-134   [Full text in PDF (284K)]

Research Announcements

NOGALES, A.G., OYOLA, J.A., PÉREZ, P.
On the equivalence of invariance and almost-invariance from a Bayesian point of view.
Extracta Math. 16(1) (2001), 135-140   [Full text in PDF (137K)]

NOGALES, A.G., OYOLA, J.A., PÉREZ, P.
A Weak notion of equivalence in Bayesian statistical theory.
Extracta Math. 16(1) (2001), 141-146   [Full text in PDF (138K)]

GALLARDO-GUTIÉRREZ, E.A., MONTES-RODRÍGUEZ, A.
Cyclic behavior of linear fractional composition operators.
Extracta Math. 16(1) (2001), 147-152   [Full text in PDF (143K)]

	EXTRACTA MATHEMATICAE
	Vol. 15, Num. 3 (2000)

Expository Papers

VONDRA, A.
Higher-order differential equations represented by connections on prolongations of a fibered manifold.
Extracta Math. 15(3) (2000), 421-512   [Full text in PDF (554K)]

Research Papers

NAILANA, K.R.
Ordered spaces and quasi-uniformities on spaces of continuous order-preserving functions.
Extracta Math. 15(3) (2000), 513-530   [Full text in PDF (223K)]

URQUIZA, R., GONZÁLEZ, H.
Radio de estabilidad real de sistemas bidimensionales para perturbaciones lineales dependientes del tiempo.
Extracta Math. 15(3) (2000), 531-545   [Full text in PDF (201K)]

HOLICKÝ, P., KOMÍNEK, V.
Two remarks on the structure of sets of exposed and extreme points.
Extracta Math. 15(3) (2000), 547-561   [Full text in PDF (228K)]

Research Announcements

BUSTAMANTE, J., CUAUHTEMOC, R.
The best algebraic approximation in Hölder norm.
Extracta Math. 15(3) (2000), 563-566   [Full text in PDF (130K)]

	EXTRACTA MATHEMATICAE
	Vol. 15, Num. 2 (2000)

III Congress on Banach Spaces
Jarandilla de la Vera (Cáceres - Spain)
November 2-6, 1998

ACOSTA, M.D., RUIZ GALÁN, M.
Reflexive spaces and numerical radius attaining operators.

FERNÁNDEZ, M., PALACIOS, I.
Smith's counterexample about uniform rotundity in every direction.

MARTÍN, M.
A survey on the numerical index of a Banach space.

KIRWAN, P.
Complexification norms and estimations for polynomials.

BLASCO, F.
Copies of l_p in tensor products.

CABELLO SÁNCHEZ, F., GARCÍA, R., VILLANUEVA, I.
Extension of multilinear operators on Banach spaces.

PLICHKO, A.M., YOST, D.
Complemented and uncomplemented subspaces of Banach spaces.

CASTILLO, J.M.F.
Banach spaces, à la recherche du temps perdu.

CABELLO, F., CASTILLO, J.M.F., YOST, D.
Sobczyk's theorems from A to B.

	EXTRACTA MATHEMATICAE
	Vol. 15, Num. 1 (2000)

Expository Papers

KALENDA, O.F.K.
Valdivia compact spaces in topology and Banach space theory.

Research Papers

ABDELALI, Z., CHIDAMI, M.
Théorèmes de structure sur certaines algèbres m-convexes commutatives.

NDIAYE, M., GIACOMINI, H.
Quadratic systems equivalent by domains to a linear one: global phase portraits.

BENSLIMANE, M., MESMOUDI, L., RODRÍGUEZ PALACIOS, A.
A characterization of commutativity for non-associative normed algebras.

FONF, V.P.
On the boundary of a polyhedral Banach space.

CAMACHO, L.M., GÓMEZ, J.R., NAVARRO, R.M.
Cohomology of some nilpotent Lie algebras.

SHARMA, S.D., KUMAR, R.
Compact composition operators and Carleson measure in the upper half-plane.

SÁNCHEZ PÉREZ, E.A.
Absolutely summing operators between Banach spaces of finite cotype.

GARCÍA, A.G., HERNÁNDEZ-MEDINA, M.A.
On the regular Sturm-Liouville transform.

RAO, T.S.S.R.K.
Weakly continuous functions of Baire class 1.

VESELÝ, L.
Boundary of polyhedral spaces: an alternative proof.

GASULL, A., PROHENS, R.
Simple examples of one-parameter planar bifurcations.

Research Announcements

PIRASHVILI, T.
Ganea term for CCG-homology of crossed modules.

BERMÚDEZ, T., MILLER, V.G.
On operators T such that f(T) is hypercyclic.

	EXTRACTA MATHEMATICAE
	Vol. 14, Num. 3 (1999)

Expository Papers

KHELDOUNI, A.
Sur la dualité de Poincaré.

Research Papers

AVILA-VALES, E.J.
A global attractor in a general diffusive food chain model.

CEGARRA, A.M.
Homotopy representability of Brauer groups.

FABIAN, M., ZIZLER, V.
An elementary approach to some questions in higher order smoothness in Banach spaces.

HOUIMDI, M., ZGUITTI, H.
théorie spectrale locale appliquée aux opérateurs shifts.

OUKESSOU, M., MIRI, A.
Sur les suranneaux minimaux.

CHOUKRI, R.
m-convexité dans le corps C(X).

KALENDA, O.F.K.
Valdivia compacta and subspaces of C(K) spaces.

Research Announcements

BERMÚDEZ, T., MARTINÓN, A.
Chain-finite operators and locally chain-finite operators.

	EXTRACTA MATHEMATICAE
	Vol. 14, Num. 2 (1999)

Proceedings of the
Second International Seminar on Geometry,
Continua and Microstructure
Getafe, Madrid (Spain), June 8-10, 1998

BINZ, E., DE LEÓN, M., SOCOLESCU, D.
Global dynamics of media with microstructure.

CARDONA, J.M., FOREST, S., SIEVERT, R.
Towards a theory of second grade thermoelasticity.

DÍAZ, J.I.
Two problems in homogenization of porous media.

EPSTEIN, M.
On the anelastic evolution of second-grade materials.

FERNÁNDEZ, A., GARCÍA, P.L.
Variational theory of non-perfect relativistic fluids.

MAUGIN, G.A.
Some thoughts on the "material" mechanics of materials.

SEGEV, R., RODNAY, G.
On volumetric growth and material frames.

STOLZ, C.
Morphological analysis and variational formulation in heterogeneous thermoelasticity.

TUCKER, R.W., TUNG, R.S., WANG, C.
Nonlinear flexural excitations and drill-string dynamics.

	EXTRACTA MATHEMATICAE
	Vol. 14, Num. 1 (1999)

Research Papers

BAHAJ, M.
Periodicité des solutions d'equations differentielles dans les espaces de Banach.

CHERRABI, A., MIRI, A.
Tight closure of an ideal generated by an R-sequence.

DIEROLF, S.
On the associated locally connected space.

GONZÁLEZ, F., USPENSKIJ, V.V.
On homomorphisms of groups of integer-valued functions.

SHARMA, S.D., BHANU, U.
Composition operators on vector-valued Hardy spaces.

Research Announcements

BERMÚDEZ, T., GONZÁLEZ, M.
Almost regular operators are regular.

HUN HONG, D., ORDÓÑEZ CABRERA, M., HAK SUNG, S., VOLODIN, A.I.
Again on the weak law in martingale type p Banach spaces.

MACKEY, M., MELLON, P.
The quasi-invertible manifold of a JB*-triple.

NOGALES, A.G., OYOLA, J.A., PÉREZ, P.
On conditional independence and the relationship between sufficiency and invariance under the Bayesian point of view.

VIEITES RODRÍGUEZ, A.M., CASAS MIRÁS, J.M.
Derivations of crossed modules.

Workshops, Meetings and Congress

FAA 98
Report and abstracts of the Meeting Functional Analysis and Applications, Gargano, Italy, 1998.

	EXTRACTA MATHEMATICAE
	Vol. 13, Num. 3 (1998)

Research Papers

BENAYED, M.
Matched pairs and extensions of Lie bialgebras.

BOUCETTA, M.
Sur les intégrales premières symétriques du flot géodésique.

CAROTHERS, D.C., FELDMAN, W.A.
The band generated by homomorphisms on Banach lattices.

CHARATONIK, J.J.
Some questions on the composition factor property for atomic mappings.

EL KINANI, A.
Extension d'un théorème de von Neumann dans les a*-Algèbres.

FELIPE, R., VELÁSQUEZ, R.
Equations of Lax type with a triple bracket.

FERNÁNDEZ MUÑIZ, J.L., GUZMÁN OVANDO, M.E.
Ries'z lattices and almost positive operators.

FRANCO, D., NIETO, J.J., ROGOVCHENKO, Y.V.
Periodic boundary value problem for nonlinear first order ordinary differential equations with impulses at fixed moments.

HOUIMDI, M., OUALI, M.
Sur le spectre d'un shift à poids opérateurs.

DE LEÓN, M., MARTÍN DE DIEGO, D.
Conservation laws and symmetry in economic growth models: a geometrical approach.

LINDEBOOM (GROENEWALD), L., RAUBENHEIMER, H.
A note on the singular spectrum.

MOHAMMADINE, B.
Sur les vitesses de convergence en theorie des values extremes.

PALLESCHI, M., TURRINI, C.
On polarized surfaces with a small generalized class.

CABEZAS, J.M., GÓMEZ, J.R.
Las álgebras de Lie (n-3)-filiformes como extensiones por derivaciones.

Research Announcements

CASAS MIRÁS, J.M.
Central extensions of Leibniz algebras.

	EXTRACTA MATHEMATICAE
	Vol. 13, Num. 2 (1998)

Survey Papers

ECHEVERRÍA, A., MUÑOZ, M., ROMÁN, N., VICTORIA, C.
Mathematical foundations of geometric quantization.

Research Announcements

ABREU, R., BORY, J.
Solvability of a Riemann linear conjugation problem on a fractal surface.

BERMÚDEZ, T., GONZÁLEZ, M., MBEKHTA, M.
Local ergodic theorems.

ROMAGUERA, S., SCHELLEKENS, M.
On the structure of the dual complexity space: the general case.

	EXTRACTA MATHEMATICAE
	Vol. 13, Num. 1 (1998)

Survey Papers

CAIRÓ, L., FEIX, M.R.
Similarity and rescaling.

Research Papers

BARRIO, R.
A matrix analysis of the stability of the Clenshaw algorithm.

SCHMOEGER, C.
On operators T such that Weyl's theorem holds for f(T).

DIEROLF, S., AYE AYE, K.
On the spectra of elements in certain algebras of vector valued functions and sequences.

CHAVARRIGA, J., GINÉ, J.
Integrable systems via inverse integrating factor.

FERNÁNDEZ LÓPEZ, A., JAA, O.
Local algebras and the largest spectrum finite ideal.

GONZÁLEZ, M., MOLINA, M.
A note on the L¹-convergence of a superadditive bisexual Galton-Watson process.

ÁLVAREZ, M., LLIBRE, J.
Restricted three-body problems and the non-regularization of the elliptic collision restricted isosceles three-body problem.

AMIR, B., MANIAR, L.
Application de la théorie d'extrapolation pour la résolution des équations différentielles à retard homogènes.

MARINO, G.
When is any continuous function Lipschitzian?

PYRIH, P.
Norm and pointwise topologies need not to be binormal.

GALINDO, J., HERNÁNDEZ, S.
On a theorem of van Douwen.

SHIH, J.A.
Théorème d'existence et d'unicité pour un système d'équations aux dérivées partielles non-linéaire.

Research Announcements

BERMÚDEZ, T., GONZÁLEZ, M.
On the boundedness of the local resolvent function.

	EXTRACTA MATHEMATICAE
	Vol. 12, Num. 3 (1997)

Expository Papers

PHELPS, R.R.
Lectures on maximal monotone operators.

Research Papers

CARRASCO, P., MARTÍNEZ MORENO, J.
A 2-dimensional cohomology with coefficients in categorical groups.

HALUSKA, J.
On two algorithms in music acoustics.

RAO, T.S.S.R.K.
Spaces of operators as continuous function spaces.

BARRY, M., GUEYE, C.T., SANGHARE, M.
On commutative FGI-rings.

SEGEV, R.
On symmetrically growing bodies.

AASILA, M.
Arbitrary exponential decay of energy for a class of bilinear control problems.

EL-MILOUDI, M., ALAIN, B.
Asymptotics for quasilinear equations with nearly critical growth.

APARICIO, I., FLORÍA, L.
A BF-regularizationof a nonstationary two-body problem under the Maneff perturbing potential.

Research Announcements

VILLANUEVA DÍEZ, I.
Completely continuous multilinear operators on C(K)-spaces.

FERNÁNDEZ UNZUETA, M.
Unconditionally convergent polynomials in Banach spaces and related properties.

GALINDO, P., MAESTRE, M., RUEDA, P.
R-Schauder decompositions. Some applications.

MARJORAM, M.
Irreducible characters of a Sylow p-subgroup of the orthogonal group.

Announcements

Conference on Banach Spaces III (Noviembre-98)

	EXTRACTA MATHEMATICAE
	Vol. 12, Num. 2 (1997)

II Congress on Examples and Counterexamples in Banach Spaces
Badajoz (Spain), November 6-8, 1996

ANSEMIL J.M.
Quasinormable spaces of polynomials.

CABELLO SÁNCHEZ, F.
Regards sur le problème des rotations de Mazur.

CASTILLO J.M.F.
Snarked sums of Banach spaces.

CEMBRANOS P.
c ₀, l₁ and l_∞ in functions spaces.

DÍAZ J.C.
Polynomials and multilinear forms on spaces isomorphic to their cartesian square.

GONZÁLEZ M., MARTÍNEZ-ABEJÓN A.
Quotients of L₁ by reflexive subspaces.

GONZALO R., JARAMILLO J.A.
Separating polynomials on Banach spaces.

MORENO GALINDO A., RODRÍGUEZ PALACIOS A.
The norm extension problem: positive results and limits.

PAPINI P.L.
On weakly uniformly convex spaces according to Calder.

PAYÁ; R.
Norm attaining operators versus bilinear forms.

YOST D.
The Johnson-Lindenstrauss space.

	EXTRACTA MATHEMATICAE
	Vol. 12, Num. 1 (1997)

Research Papers

ALLALI, K., TAA, A.
Caractérisation de la dérivabilité des fonctions à partir de la dérivée directionnelle.

ARDANUY ALBAJAR, R., LÓPEZ FIDALGO, J.F.
Characterizing the general multivariate normal distribution through the conditional distributions.

BUSTAMANTE GONZÁLEZ, J., ESCOBEDO CONDE, R.
When a composition algebra is barrelled?

NASROALLAH, A.
Simulation of high available fault-tolerant systems by simulating stiff and large Markov chains.

STEMPAK, K.
A note on Zemanian spaces.

BENSLIMANE, M., BOUDI, N.
Alternative Noetherian Banach algebras.

ELKOHEN, A., SADIKY, H.
Estimation L_p de la solution de l'equation des ondes sur le demi-plan de Poincaré.

HAILY, A.
A non-semiprime associative algebra with zero weak radical.

GESUALDO, A., GUARRACINO, F., MALLARDO, V., MINUTOLO, V., NUNZIANTE, L.
Flaw identification in elastic solids: theory and experiments.

Research Announcements

BERMÚDEZ, T.
Meromorphic functional calculus and local spectral theory.

	EXTRACTA MATHEMATICAE
	Vol. 11, Num. 3 (1996)

Research Papers

ABEL, U., ARENDS, G.
The powers of the bivariate Bernstein operators.

ALAA, N.
Quasilinear elliptic equations with arbitrary growth nonlinearity and data measures.

ARRANZ, F.
Uncomplemented copies of C(K) inside C(K).

BENSLIMANE, M., BOUDI, N.
Isomorphisms of Jordan-Banach algebras.

BERRAHMOUNE, L.
Stabilization of the wave equation with unbounded feedback of finite range.

BULLEJOS, M.
A note on Hacque's cohomology of rings-groups and extensions of rings-groups by groups.

CHERGUI, J.D.
The integrated squared error estimation of parameters.

DIMOV, H.D., NENOV, S.I.
Features of uncontinuable solutions of impulsive dynamical systems.

LAAYOUNI, M.
Théorème de Cohen-Hewitt dans une algèbre de Jordan-Fréchet.

OSTROVSKII, M.I.
Generalization of projection constants: sufficient enlargements.

Research Announcements

ALONSO, C., GUTIÉRREZ, J., RECIO, T.
Un algoritmo de descomposición de funciones racionales mediante polinomios casi-separados.

AZAGRA, D., GÓMEZ, J., JARAMILLO, J.A.
Rolle's theorem and negligibility of points in infinite dimensional Banach spaces.

BENÍTEZ, C., FERNÁNDEZ, M., SORIANO, M.L.
Suitable norms for simultaneous approximation.

BLASCO, F.
Complementation in spaces of symmetric tensor products and polynomials.

MATEOS, A., RÍOS-INSUA, S.
A characterization of value efficiency.

	EXTRACTA MATHEMATICAE
	Vol. 11, Num. 2 (1996)

Research Papers

GONZÁLEZ, A.B., MARTÍN, P.
A note concerning Gauss-Jackson method.

BEDDAA, A.
Sur l'expression du radical et du spectre dans une algèbre normée non complète.

KHELDOUNI, A., LAMRINI, F.
Chern-dold character in elliptic cohomology.

ROMAGUERA, S., SHORE, S.D.
Weakly complete semimetrizable spaces and complete metrizability.

DRAGOMIR, S.S., MOND, B.
On a property of Gram's determinant.

ZAHID, M.
Fonctionnelle additive et ellipticité.

ILLOUSAMENT, E.
Continuité automatique des dérivations et des epimorphismes II.

COBOS, J.
A mathematician out of his time: Ventura Reyes Prosper.

FLORÍA, L.
A proof of universality of arc length as time parameter in Kepler problems.

DE LEÓN, M., MARTÍN DE DIEGO, D.
Solving non-holonomic Lagrangian dynamics in terms of almost product structures.

SELIVANOV, YU V.
Weak homological bidimension and its values in the class of biflat banach algebras.

Research Announcements

NÁPOLES V., J.E.
On the continuability of solutions of bidimensional systems.

GARMENDIA RODRÍGUEZ, M.J., NAVARRO GONZÁLEZ, J.A.
Mathematical theory of musical scales.

BERMÚDEZ, T., GONZÁLEZ, M., MARTINÓN, A.
Properties and applications of the local functional calculus.

CHOI, Y.S.
Some results on norm attaining bilinear forms on L¹[0,1].

CABELLO, F., CASTILLO, J.M.F.
Report on twisted sums of Banach spaces.

	EXTRACTA MATHEMATICAE
	Vol. 11, Num. 1 (1996)

Third Meeting on Current Ideas in Mechanics and Related Fields
Segovia (Spain), June 19-23, 1995

BINZ, E.
Idealized skins constitued by finitely many material particles.

CAPRIZ, G., MAZZINI, G.
Interactions between subbodies for complex materials.

CHUDNOVSKY, A., PRESTON, S.
Geometrical modeling of material aging.

CORONA, C.M.
Exact integration of the Cauchy-Green tensor.

EHRENTRAUT, H., MUSCHIK, W.
Balance laws and constitutive equations for liquid crystals.

ELZÀNOWSKI, M., PRESTON, S.
On non-holonomic second-order connections with applications to continua with microstructure.

GARCÍA DE ANDRADE, L.C., DE SOUZA LIMA, C.A.
On Cartan's differential geometry of torque stress in cylindrical solids.

GRÁCIA, X.
Noether (and Gauge) transformations for higer order singular Lagrangians.

IBORT, L.A.
The geometry of dynamics.

KOLÁR I.
Natural operations on higher order singular Lagrangians.

DE LEÓN, M., EPSTEIN, M.
Geometric characterization of the homogeneity of continua with microstructure.

DE LEÓN, M., MARTÍN DE DIEGO, D.
Non-holonomic mechanical systems in jet bundles.

MAINARDI, F., PIRONI, P.
The fractional Langevin equation Brownian motion revisited.

MARTÍNEZ, E.
Linearisation of second order differential equations.

MUSCHIK, W., EHERNTRAUT, H.
An amendment to the second law.

ORTAÇGIL, E.
Some remarks on the Cristoffel symbols of Ehresmann ε-connections.

PAPENFUSS, C.
Continuum thermodynamics of two dimensional liquid crystals.

PARRY, G.P.
Material symmetry in stability defective crystals.

SARLET, W.
A direct geometrical construction of the dynamics of non-holonomic Lagrangian systems.

SOSA, H.
On a failure related problem of linear piezo-electricity.

TRIMARCO, C.
Soloid-solid phase-transition as a strain transformation.

VONDRA, A.
Prolongations and fields of paths for higher-order O.D.E. represented by connections on a fibered manifold.

WENZELBURGER, J.
The construction of cell-to-cell mappings from Frobenius-Perron operators.

	EXTRACTA MATHEMATICAE
	Vol. 10, Num. 2 (1995)

Expository Papers

GUTIÉRREZ, J.M., JARAMILLO, J.A., LLAVONA, J.G.
Polynomials and geometry of Banach spaces.

Research Papers

ACOSTA, M.D.
An inequality for norm of operators.

AMAHROQ, T., ALAOUI, A.E.
Mosco-convergence de suites de fonctions DC et conditions d'optimalité du second ordre.

EL AMRANI, M.
The Hermitian intersection form for a family of elliptic curves.

BARRANTES, M., GONZÁLEZ, M., MOLINA, M.
A goodness of fit test in Markov models with dependence of covariates.

CABELLO SÁNCHEZ, F., CASTILLO, J.M.F.
Isometries of finite-dimensional normed spaces.

DEHERI, G.M.
Some properties of DF-dF-Spaces.

DINEEN, S.
Holomorphic functions on fréchet spaces with Schauder Basis.

KHELDOUNI, A., LAMRINI, F.
Genres multiplicatifs et opérations de Steenrod.

GARCÍA, R.
A note on the Dunford-Pettis property for quotients of C(K).

Research Announcements

BERMÚDEZ, T., GONZÁLEZ, M., MARTINÓN, A.
On the poles of the local resolvent.

DRAGHIA, D.D.
Semi-simplicity of some semi-prime Banach algebras.

FERNÁNDEZ, M., PALACIOS, I.
Directional uniform rotundity in spaces of essentially bounded functions.

GONZÁLEZ, M., MARTÍNEZ ABEJÓN, A.
Tauberian operators on spaces of integrable functions.

	EXTRACTA MATHEMATICAE
	Vol. 10, Num. 1 (1995)

Expository Papers

SINGH, R.K., SINGH, B.
Compact weighted composition operators on spaces of continuous functions: a survey.

Research Papers

CANO SEVILLA, F.J., MUNDUATE DEL RÍO, A., PÉREZ PRADOS, A.
Efecto de un proceso de poda en algunos coeficientes de asociación derivados del estadístico χ².

CASTILLO, J.M.F.
On Banach Spaces X such that L(L_p , X) = K(L_p , X).

DE LEÓN, M., MARTÍN DE DIEGO, D.
Almost product structures and poisson reduction of presymplectic systems.

BOUKFAOUI, Y. EL, BOUNABAT, A., BOUSLOUS, H.
Stabilisation par retour d'etat d'un système bilinéaire en dimension infinie.

Research Announcements

BERK, R.H., NOGALES, A.G., OYOLA, J.A.
Some counterexamples concerning sufficiency and invariance.

DRAGHIA, D.
Continuity of derivations on semi-prime Banach algebras.

DRAGHIA, D.
Continuity of Jordan homomorphisms of Banach algebras.

FERNÁNDEZ, M., PALACIOS, I.
Relative rotundity in L^p(X).

FERNÁNDEZ, M., SORIANO, M.L.
On the Chebyshev alternation theorem.

NOGALES, A.G. AND OYOLA, J.A.
Some remarks on sufficiency, invariance and conditional independence.

BERMÚDEZ, T., GONZÁLEZ, M., MARTINÓN, A.
Stability of the local spectrum.

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