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Mostrando ítems 171-180 de 509
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Un primer encuentro con la Hipótesis de Riemann y su comprobación numérica
(Real Sociedad Matemática Española, 2010)
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Fixed point property for general topologies in some Banach spaces
(Cambridge University Press, 2004)
We study the fixed point property with respect to general vector topologies in L-embedded Banach spaces. Considering a class of topologies in l1 such that the standard basis is convergent, we characterize those of them ...
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Approximation numbers of composition operators on the Hardy space of the infinite polydisk
(Springer, 2017-12)
We study the composition operators of the Hardy space on D∞ ∩ℓ1, the ℓ1 part of the infinite polydisk, and the behavior of their approximation numbers.
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Universality of holomorphic functions bounded on closed sets
(Elsevier, 2006-03-01)
In this note, the existence of translation-universal entire functions which are bounded on certain closed subsets is characterized in terms of topological and geometrical properties of such subsets. Corresponding results ...
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Artículo
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Sharp weighted endpoint estimates for commutators of singular integral operators
(University of Michigan, 2001)
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Sharp weighted estimates for classical operators
(Elsevier, 2012-01-15)
We prove sharp one and two-weight norm inequalities for some of the classical operators of harmonic analysis: the Hilbert and Riesz transforms, the Beurling-Ahlfors operator, the maximal singular integrals associated to ...
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Mellin transforms for some families of q-polynomials
(Elsevier, 2003-04-01)
By using Ramanujan's q-extension of the Euler integral representation for the gamma function, we derive the Mellin integral transforms for the families of the discrete q-Hermite II, the Al-Salam–Carlitz II, the big q-Laguerre, ...
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A proof of a trigonometric inequality. A glimpse inside the mathematical kitchen
(2011-09)
We prove the inequality ∞ ∑ k=1(−1) k+1 rk cos kφ k+2 < ∞ ∑ k=1 (−1) k+1 rk k+2 for 0 < r 1 and 0 < φ < π . For the case r = 1 we give two proofs. The first one is by means of a general numerical technique (Maximal Slope ...
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About some families of nonexpansive mappings with respect to renorming
(Hindawi Publishing Corporation, 2016)
We characterize the family of nonexpansive mappings which are invariant under renormings and we also compare the families of nonexpansive mappings under two equivalent norms.