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Space strategy and the rise of space forcesEstratégia espacial e a ascensão das forças espaciais
(Universidade Federal de Santa Maria, 2023)
Extra Invariance of a Shift-Invariant Space in LCA Groups
(Elsevier, 2010-10)
This article generalizes recent results in the extra invariance for shift-invariant spaces to the context of LCA groups. Let G be a locally compact abelian (LCA) group and K a closed subgroup of G. A closed subspace of ...
The index of exceptional symmetric spaces
(Universidad Autónoma de Madrid, 2020-11)
The index of a Riemannian symmetric space is the minimal codimension of a proper totally geodesic submanifold. There is a conjecture for how to calculate the index. In this paper we give an affirmative answer to this ...
On the geometry of spaces of homogeneous type and the democracy of Haar systems in Lorentz spaces
(Academic Press Inc Elsevier Science, 2019-08)
We explore the relation of the geometric structure of the underlying space and the democratic character of Haar systems in Lorentz spaces. We show that, aside from homogeneity, some particular behavior of the space at large ...
Characterization of coorbit spaces with phase-space covers
(Academic Press Inc Elsevier Science, 2012-01)
We show that coorbit spaces can be characterized in terms of arbitrary phase-space covers, which are families of phase-space multipliers associated with partitions of unity. This generalizes previously known results for ...
Characterizations of weighted Besov spaces
(Wiley VCH Verlag, 2006-12)
We define a class of weighted Besov spaces and we obtain a characterization of this class by means of an appropriate class of weighted Lipschitz φ spaces.
Function spaces of coercivity for the fractional Laplacian in spaces of homogeneous type
(Duke University Press, 2019-05)
We combine dyadic analysis through Haar type wavelets defined on Christ´s families of generalized cubes, and Lax-Milgram theorem, in order to prove existence of Green´s functions for fractional Laplacians on some function ...
T1 Theorems on generalized Besov and Triebel-Lizorkin spaces over spaces of homogeneous type
(Unión Matemática Argentina, 2000-04)
In this paper we extend the definition of the Besov and the Triebel-Lizorkinspaces in the context of spaces of homogeneous-type given by Han and Sawyer in[HS] . We consider, as a control of the ´local regularity ´ , functions ...
Characterization of bmo using wavelets through triebellizorkin spaces
(Centro de Investigaciones en Matemática Pura y Aplicada (CIMPA) y Escuela de Matemática, San José, Costa Rica., 2019)
El espacio cociente y algunas propiedades geométricas de los espacios de BanachEl espacio cociente y algunas propiedades geométricas de los espacios de Banach
(Universidad de Costa Rica, Centro de Investigación en Matemática Pura y Aplicada (CIMPA), 1999)