Browsing Artículos (Análisis Matemático) by Issue Date
Now showing items 2140 of 452

Category measures on Baire spaces [Article]
(Universitat Autònoma de Barcelona, 1990)The purpose of this paper is to give a necessary and sufñcient condition to define a category measure on a Baire topological space. In the last section we give some examples of spaacs in these conditions.

Two weighted norm inequalities for Riesz potentials and uniform Lpweigthed Sobolev inequalities [Article]
(Indiana University, 1990) 
Connections between some measures of noncompactness and associated operators [Article]
(Universidad de Extremadura, 1990)Some relationships between the Kuratowski's measure of noncompactness, the ball measure of noncompactness and the dseparation of the points of a set are studied in special classes of Banach spaces. These relations are ...

A special type of triangulations in numerical nonlinear analysis [Article]
(Universidad de Extremadura, 1991) 
A pointwise estimate for the kernel of a pseudodifferential operator, with applications [Article]
(Unión Matemática Argentina, 1991) 
Weighted norm inequalities for general maximal operators [Article]
(Universitat Autònoma de Barcelona, 1991) 
The product formula [Article]
(Universitat de Barcelona, 1991)A useful property of the Brouwer degree relates the degree of a composition of maps to the degree of each map. This property, which can be generalized for the Leray Schauder degree and in some cases for the Aproper maps ...

Iteration of ultraproducts of locally convex spaces [Article]
(1993) 
A remark on weighted inequalities for general maximal operators [Article]
(American Mathematical Society, 199312)Let 1 < p < ∞, and let w, v be two non–negative functions. We give a sufficient condition on w, v for which the general maximal operator MB is bounded from Lp(v) into Lp(w). Our condition is stronger but closely related to ...

Convergence of weighted sums of random variables and uniform integrability concerning the weights [Article]
(Universitat de Barcelona, 1994)Let {ank}, n, k ∈ N be an array of real constants, and let {Xn} be a sequence of random variables. The concept of {ank}uniform integrability of {Xn} is defined and two characterizations of this concept are established. ...

Estimates with A∞ weights for various singular integral operators [Article]
(Zanichelli, 1994)Si studia la limitazione di certe classi di integrale singolari sullo spazio Lp(w), w € A∞.

Two weighted inequalities for potential and fractional type maximal operators [Article]
(Indiana University, 1994) 
Weighted norm inequalities for singular integral operators [Article]
(London Mathematical Society, 199404)For a CalderónZygmund singular integral operator T, we show that the following weighted inequality holds Z RnT f(y)p w(y)dy ≤ C Z Rn f(y) p M[p]+1w(y)dy, where Mk is the HardyLittlewood maximal operator M iterated ...

qDeformed Vibron model for diatomic molecules [Article]
(American Physical Society, 199408)A deformed version of the vibron model for diatomic molecules is constructed. Both the O(4) and U(3) dynamical symmetries of the model are rewritten, using the concept of complementary subalgebras, in a more convenient ...

The modification of classical Hahn polynomials of a discrete variable [Article]
(Taylor & Francis, 1995)We consider a modi cation of moment functionals for the Hahn classical polynomials of a discrete variable by adding two mass points at the ends of the interval, i.e., in x = 0 and x = N 1. We obtain the resulting orthogonal ...

A generalization of the classical Laguerre polynomials [Article]
(Springer, 1995)We consider a modi cation of the gamma distribution by adding a discrete measure supported in the point x = 0. For large n we analyze the existence of orthogonal polynomials with respect to such a distribution. Finally we ...

Sharp Lpweighted Sobolev inequalities [Article]
(Association des Annales de l'Institut Fourier, 1995) 
Remarks on multivalued nonexpansive mappings [Article]
(Soochow University, 199501)Convergence of fixed point sets of multivalued nonexpansive mappings is studied under both the Mosco and Hausdorff senses. A characterization for * nonexpansive multivalued mappings is given. Also a counterexample is ...

Endpoint estimates for commutators of singular integral operators [Article]
(Elsevier, 19950215)We prove endpoint estimates for commutatotrs of singular integrals with BMO functions. We first show that they satisfy L(log L) type inequalities and then that there is a Hardy space type estimate where the usual atomic ...

On sufficient conditions for the boundedness of the HardyLittlewood maximal operator between weighted Lpspaces with different weights [Article]
(London Mathematical Society, 199507)