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Propiedades de concentración en espacios de dimensión finita Inmersiones isométricas en espacios de funciones continuas [Doctoral Thesis]
(1998)
Esta memoria está dedicada al estudio de dos problemas del Análisis Funcional: El estudio de propiedades de concentración y su relación con la Geometría de los Espacios de Banach, englobado dentro de la Teoría Local de ...
A geometrical coefficient implying the fixed point property and stability results [Article]
(University of Houston, 1996)
In this paper we define a new geometric constant M(X) in Banach spaces such that X has the fixed point property for nonexpansive mappings if M(X) > 1. We prove that M(X) •_ WCS(X), the inequality being strict in many ...
On a result of W. A. Kirk [Article]
(University of Houston, 1999)
W. A. Kirk has recently proved a constructive fixed point theorem for continuous mappings in compact hyperconvex metric spaces [6]. In the present work we use the concept of hyperconvex hull of a metric space to obtain ...
Weighted norm inequalities for general maximal operators [Article]
(Universitat Autònoma de Barcelona, 1991)
Two weighted inequalities for potential and fractional type maximal operators [Article]
(Indiana University, 1994)
On the properties for modifications of classical orthogonal polynomials of discrete variables [Article]
(Elsevier, 1995-12-29)
We consider a modi cation of moment functionals for some classical polynomials of a discrete variable by adding a mass point at x = 0. We obtain the resulting orthogonal polynomials, identify them as hypergeometric functions ...
The distribution of zeros of general q-polynomials [Article]
(Institute of Physics, 1997-10-07)
A general system of q-orthogonal polynomials is de ned by means of its three-term recurrence relation. This system encompasses many of the known families of q-polynomials, among them the q-analog of the classical orthogonal ...
The dual Hahn q-polynomials in the lattice x(s) = [s]q[s + 1] q and the q-Algebras SUq(2) and SUq(1; 1) [Article]
(Institute of Physics, 1996-04-07)
The dual q-Hahn polynomials in the non uniform lattice x(s) = [s]q[s + 1]q are obtained. The main data for these polynomials are calculated ( the square of the norm the coe cients of the three term recurrence relation, ...
Some extension of the Bessel-type orthogonal polynomials [Article]
(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 ...
The limit relations between generalized orthogonal polynomials [Article]
(Elsevier, 1997-09)
We consider the different limit transitions for modifications of the classical polynomials obtained by the addition of one or two point masses at the ends of the interval of orthogonality. The connections between Jacobi, ...