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Mostrando ítems 351-360 de 509
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Invariant means and thin sets in harmonic analysis with applications to prime numbers
(Wiley, 2009-08)
We first prove a localization principle characterising Lust-Piquard sets. We obtain that the union of two Lust-Piquard sets is a Lust-Piquard set, provided that one of these two sets is closed for the Bohr topology. We ...
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A Seidel-Walsh theorem with linear differential operators
(Springer, 1999-05)
Assume that {Sn}∞1 is a sequence of automorphisms of the open unit disk D and that {Tn}∞1 is a sequence of linear differential operators with constant coefficients, both of them satisfying suitable conditions. We prove ...
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The fixed-point property in Banach spaces containing a copy of c0
(Hindawi, 2003)
We prove that every Banach space containing an isomorphic copy of c0 fails to have the fixed-point property for asymptotically nonexpansive mappings with respect to some locally convex topology which is coarser than the ...
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Complete characterizations of Kadec-Klee properties in Orlicz spaces
(University of Houston, 2003)
We study the connections between the Kadec-Klee property for local convergence in measure H`, the Kadec-Klee property for global onvergence in measure Hg and the ∆2-condition for Orlicz function spaces Lϕ equipped with ...
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Universal Taylor series with maximal cluster sets
(Consejo Superior de Investigaciones Científicas, 2009-06)
We link the overconvergence properties of certain Taylor series in the unit disk to the maximality of their cluster sets, so connecting outer wild behavior to inner wild behavior. Specifically, it is proved the existence ...
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Degenerate weak convergence of row sums for arrays of random elements in stable type p Banach spaces
(Institute of Mathematics, Academica Sinica, 1999-09)
For an array of rowwise independent random elements {Vnj , j ≥ 1, n ≥ 1} in a real separable, stable type p Banach space X and an array of constants {anj , j ≥ 1, n ≥ 1}, general weak laws of large numbers of the forms (i) ...
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Wardowski conditions to the coincidence problem
(Frontiers Media, 2015-08-31)
In this article we first discuss the existence and uniqueness of a solution for the coincidence problem: Find p ∈ X such that Tp = Sp, where X is a nonempty set, Y is a complete metric space, and T, S:X → Y are two mappings ...
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On universality of composition operators in several variables
(University of Houston, 2001)
In this paper we characterize the universality of a sequence of composition operators generated by automorphisms of the N-dimensional unit polydisc DN, on Hardy spaces of DN . In addition, we provide suitable conditions ...
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Some translation-invariant Banach function spaces which contain C0
(Polish Academy of Sciences, Institute of Mathematics, 2004)
We produce several situations where some natural subspaces of classical Banach spaces of functions over a compact abelian group contain the space c0.
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L1 → Lq Poincaré inequalities for 0 < q < 1 imply representation formulas
(Springer, 2002-01)
Given two doubling measures μ and ν in a metric space (S, ρ) of homogeneous type, let B0⊂S be a given ball. It has been a well-known result by now (see [1–4]) that the validity of an L1→L1 Poincaré inequality of the following ...