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Displaying 501 – 520 of 659

Transference for hypergroups.

Giacomo Gigante (2001)

Collectanea Mathematica

A transference theorem for convolution operators is proved for certain families of one-dimensional hypergroups.

Transformaciones entre espacios de funciones continuas casi convergentes.

F. Balibrea (1987)

Revista de la Real Academia de Ciencias Exactas Físicas y Naturales

Transformation de Poisson sur un arbre localement fini

Ferdaous Kellil, Guy Rousseau (2005)

Annales mathématiques Blaise Pascal

Dans cet article on étudie en premier lieu la résolvante (le noyau de Green) d’un opérateur agissant sur un arbre localement fini. Ce noyau est supposé invariant par un groupe $G$ d’automorphismes de l’arbre. On donne l’expression générique de cette résolvante et on établit des simplifications sous différentes hypothèses sur $G$ .En second lieu on introduit la transformation de Poisson qui associe à une mesure additive finie sur l’espace $Ω$ des bouts de l’arbre une fonction propre de l’ opérateur. On...

Transition operator characterizations of compact and maximally almost periodic locally compact groups.

Irving Glicksberg (1984)

Mathematica Scandinavica

Translation invariant operators on Lorentz spaces

Leonardo Colzani (1987)

Annali della Scuola Normale Superiore di Pisa - Classe di Scienze

Translation-invariant operators on Lorentz spaces L(1,q) with 0 < q < 1

Leonardo Colzani, Peter Sjögren (1999)

Studia Mathematica

We study convolution operators bounded on the non-normable Lorentz spaces $L^{1, q}$ of the real line and the torus. Here 0 < q < 1. On the real line, such an operator is given by convolution with a discrete measure, but on the torus a convolutor can also be an integrable function. We then give some necessary and some sufficient conditions for a measure or a function to be a convolutor on $L^{1, q}$ . In particular, when the positions of the atoms of a discrete measure are linearly independent over the rationals,...

Two problems of Calderón-Zygmund theory on product-spaces

Jean-Lin Journé (1988)

Annales de l'institut Fourier

R. Fefferman has shown that, on a product-space with two factors, an operator T bounded on $L^{2}$ maps $L^{\infty}$ into BMO of the product if the mean oscillation on a rectangle R of the image of a bounded function supported out of a multiple R’ of R, is dominated by $C | R |^{s} | R |^{- s}$ , for some $s > 0$ . We show that this result does not extend in general to the case where E has three or more factors but remains true in this case if in addition T is a convolution operator, provided $s > s_{0} (E)$ . We also show that the Calderon-Coifman bicommutators,...

Two sided norm estimate of the Bergman projection on $L^{p}$ spaces

Milutin R. Dostanić (2008)

Czechoslovak Mathematical Journal

We give some explicit values of the constants $C_{1}$ and $C_{2}$ in the inequality $C_{1} / sin (\frac{π}{p}) \leq {|P|}_{p} \leq C_{2} / sin (\frac{π}{p})$ where ${|P|}_{p}$ denotes the norm of the Bergman projection on the $L^{p}$ space.

Two-parameter multipliers on hardy spaces

Péter Simon (1998)

Colloquium Mathematicae

Two-sided $L^{1}$ -estimates for Szegö kernels on classical domains

Josephine Mitchell, G. Sampson (1990)

Annales Polonici Mathematici

Two-weight Sobolev-Poincaré inequalities and Harnack inequality for a class of degenerate elliptic operators

Bruno Franchi, Cristian E. Gutiérrez, Richard L. Wheeden (1994)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

In this Note we prove a two-weight Sobolev-Poincaré inequality for the function spaces associated with a Grushin type operator. Conditions on the weights are formulated in terms of a strong $A_{\infty}$ weight with respect to the metric associated with the operator. Roughly speaking, the strong $A_{\infty}$ condition provides relationships between line and solid integrals of the weight. Then, this result is applied in order to prove Harnack's inequality for positive weak solutions of some degenerate elliptic equations....

Über die spektralen Vielfachheitsfunktionen des Multiplikationsoperators

Klaus Kalb (1979)

Studia Mathematica

Über eine Klasse symmetrischer idealer Funktionenräume nebst Anwendungen

Jürgen Appell (1984)

Commentationes Mathematicae Universitatis Carolinae

Über Kommutatoren und Störungsmetriken und ihre Beziehung zum Funktionalkalkül.

Karl-Heinz Förster (1972)

Manuscripta mathematica

Un espace de Banach réticulé qui a presque la propriété de Radon-Nikodym

Michel Talagrand (1983)

Studia Mathematica

Une remarque sur un théorème de Bourgain

Dominique Schneider, Michel Weber (1993)

Séminaire de probabilités de Strasbourg

Uniform bounds for the bilinear Hilbert transforms (II).

Xiaochun Li (2006)

Revista Matemática Iberoamericana

We continue the investigation initiated in [Grafakos, L. and Li, X.: Uniform bounds for the bilinear Hilbert transforms (I). Ann. of Math. (2)159 (2004), 889-933] of uniform Lp bounds for the family of bilinear Hilbert transformsHα,β(f,g)(x) = p.v. ∫R f(x - αt) g (x - βt) dt/t.

Currently displaying 501 – 520 of 659

Previous Page 26 Next

Displaying 501 – 520 of 659

Transference for hypergroups.

Transformaciones entre espacios de funciones continuas casi convergentes.

Transformation de Poisson sur un arbre localement fini

Transition operator characterizations of compact and maximally almost periodic locally compact groups.

Translation invariant operators on Lorentz spaces

Translation-invariant operators on Lorentz spaces L(1,q) with 0 < q < 1

Two problems of Calderón-Zygmund theory on product-spaces

Two sided norm estimate of the Bergman projection on $L^{p}$ spaces

Two-parameter multipliers on hardy spaces

Two-sided $L^{1}$ -estimates for Szegö kernels on classical domains

Two-weight Sobolev-Poincaré inequalities and Harnack inequality for a class of degenerate elliptic operators

Über die spektralen Vielfachheitsfunktionen des Multiplikationsoperators

Über eine Klasse symmetrischer idealer Funktionenräume nebst Anwendungen

Über Kommutatoren und Störungsmetriken und ihre Beziehung zum Funktionalkalkül.

Un espace de Banach réticulé qui a presque la propriété de Radon-Nikodym

Une remarque sur un théorème de Bourgain

Uniform bounds for the bilinear Hilbert transforms (II).

Uniform Convergence of Operators on L... and Similar Spaces.

Uniform estimates for some paraproducts.

Uniform ordered spectral decompositions

Currently displaying 501 – 520 of 659