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Mostrando ítems 341-350 de 509
Artículo
Generalized asymptotic pointwise contractions and nonexpansive mappings involving orbits
(Springer Open, 2010)
We give fixed point results for classes of mappings that generalize pointwise contractions, asymptotic contractions, asymptotic pointwise contractions, and nonexpansive and asymptotic nonexpansive mappings. We consider the ...
Artículo
A1 bounds for Calderón-Zygmund operators related to a problem of Muckenhoupt and Wheeden
(International Press, 2009)
We obtain an Lp(w) bound for Calderón-Zygmund operators T when w ∈ A1. This bound is sharp both with respect to ∥w∥A1 and with respect to p. As a result, we get a new L1,∞(w) estimate for T related to a problem of Muckenhoupt ...
Artículo
Some extension of the Bessel-type orthogonal polynomials
(Taylor & Francis, 1998)
We consider the perturbation of the classical Bessel moment functional by the addition of the linear functional M0 (x) + M1 0 (x), where M0 and M1 2 IR. We give necessary and su cient conditions in order for this functional ...
Artículo
Maximal cluster sets on spaces of holomorphic functions
(Oldenbourg, 2004)
This is an expository paper where we relate some aspects of the problem of looking for holomorphic functions with maximal cluster sets under the action of operators defined on spaces of holomorphic functions. Some functional ...
Artículo
Algebraic genericity of strict-order integrability
(Polish Academy of Sciences, Institute of Mathematics, 2010)
We provide sharp conditions on a measure µ defined on a measurable space X guaranteeing that the family of functions in the Lebesgue space Lp (µ, X) (p ≥ 1) which are not integrable with order q for any q > p (or any q < ...
Artículo
Borsuk-Dugundji type extension theorems with Busemann convex target spaces
(Finnish Academy of Science and Letters, 2018)
In this work we study continuity properties of convex combinations in Busemann convex geodesic spaces and apply them to obtain two extension results for continuous and Lipschitz mappings with values in a Busemann convex space.
Artículo
Aplicaciones de las categorías de Baire a la existencia de solución de una ecuación diferencial en un espacio de Banach
(Real Academia de Ciencias Exactas, Físicas y Naturales, 1981)
Artículo
Total and non-total suborbits for hypercyclic operators
(Springer, 2022-11-11)
In this note, it is proved that if X is a separable infinite dimensional Fréchet space that admits a continuous norm then, given a closed infinite dimensional subspace of X, there exists a hypercyclic operator admitting ...
Artículo
La enseñanza de las Matemáticas a debate: a) La motivación de la enseñanza a través de las aplicaciones b) La enseñanza de las Matemáticas en Europa
(Sociedad Española de Matemática Aplicada, 2000-12)