Oxford Index Search Results

You are looking at 41-60 of 117 items for:

Banach space x Science and Mathematics x clear all

THE SPECTRUM OF VOLTERRA OPERATORS ON WEIGHTED SPACES OF ENTIRE FUNCTIONS

José Bonet.

in The Quarterly Journal of Mathematics

September 2015; p ublished online June 2015 .

Journal Article. Subjects: Pure Mathematics. 4544 words.

We investigate the spectrum of the Volterra operator [math] with symbol an entire function [math], when it acts on weighted Banach spaces [math] of entire functions with sup-norms and when...

Numerical‐Radius‐Attaining Polynomials

M. D. Acosta, J. Becerra Guerrero and M. Ruiz Galán.

in The Quarterly Journal of Mathematics

March 2003; p ublished online March 2003 .

Journal Article. Subjects: Pure Mathematics. 0 words.

In this paper we discuss a version of James theorem making use of polynomials which attain their numerical radius. In addition, we obtain a characterization of finite‐dimensional Banach...

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On the dentability of weak*-Hδ sets

M. Raja.

in The Quarterly Journal of Mathematics

September 2005; p ublished online September 2005 .

Journal Article. Subjects: Pure Mathematics. 0 words.

We state several conditions equivalent to weak*-dentability for certain subsets of a dual Banach space which include both the compact case and a result of Ghoussoub and Maurey.

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The vector-valued nonhomogeneous Tb Theorem

Tuomas P. Hytönen.

in International Mathematics Research Notices

January 2014; p ublished online October 2012 .

Journal Article. Subjects: Mathematics. 12407 words.

This paper gives a Banach space-valued extension of the Tb theorem of Nazarov et al. [20] concerning the boundedness of singular integral operators with respect to a measure μ, which only...

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DUALITY IN SPACES OF LORCH ANALYTIC MAPPINGS

Luiza A. Moraes and Alex F. Pereira.

in The Quarterly Journal of Mathematics

September 2016; p ublished online September 2016 .

Journal Article. Subjects: Pure Mathematics. 4433 words.

For a complex Banach algebra [math], we study the strong dual of the Fréchet space [math] of the mappings [math] that are analytic in the sense of Lorch. First, we will show that [math] is...

POLYNOMIAL NUMERICAL INDEX FOR SOME COMPLEX VECTOR-VALUED FUNCTION SPACES

Yun Sung Choi, Domingo García, Manuel Maestre and Miguel Martín.

in The Quarterly Journal of Mathematics

December 2008; p ublished online January 2008 .

Journal Article. Subjects: Pure Mathematics. 0 words.

We study the relation between the polynomial numerical indices of a complex vector-valued function space and the ones of its range space. It is proved that the spaces C(K, X) and Lnull...

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SEMISIMPLE BANACH ALGEBRAS GENERATED BY STRONGLY CONTINUOUS REPRESENTATIONS OF MOORE GROUPS

J. Alaminos, J. Extremera and A. R. Villena.

in The Quarterly Journal of Mathematics

June 2008; p ublished online December 2007 .

Journal Article. Subjects: Pure Mathematics. 0 words.

We prove that if τ is a strongly continuous bounded representation of a Moore group G on a Banach space X, and if the Arveson spectrum of τ is scattered, then the closure with respect to...

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A NOTE ON FRAGMENTABILITY AND WEAK-G δ SETS

V. P. Fonf, R. J. Smith and S. Troyanski.

in The Quarterly Journal of Mathematics

June 2012; p ublished online June 2012 .

Journal Article. Subjects: Pure Mathematics. 0 words.

In terms of fragmentability, we describe a new class of Banach spaces which may be c 0-saturated but do not contain weak-G δ open...

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Non-linear fractional integro-differential systems with non-local conditions

Hamdy M. Ahmed.

in IMA Journal of Mathematical Control and Information

June 2016; p ublished online November 2014 .

Journal Article. Subjects: Mathematics. 4251 words.

We prove the existence of mild solutions of fractional integro-differential equations with non-local conditions in Banach spaces. Sufficient conditions for controllability of fractional...

Operator splitting for abstract Cauchy problems

M Bjørhus.

in IMA Journal of Numerical Analysis

July 1998; p ublished online July 1998 .

Journal Article. Subjects: Mathematics. 0 words.

The operator splitting technique is formulated for inhomogeneous abstract Cauchy problems in Banach spaces, and its convergence properties are analyzed using the concepts, familiar from...

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On a multistep method approximating a linear sectorial evolution equation

Nicoletta Del Buono and Adrian T. Hill.

in IMA Journal of Numerical Analysis

July 2002; p ublished online July 2002 .

Journal Article. Subjects: Mathematics. 0 words.

This paper concerns the linear multistep approximation of an abstract dissipative linear sectorial evolution equation on a Banach space X. We study how well the semigroup generated by a...

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H Functional Calculus and Maximal Inequalities for Semigroups of Contractions on Vector-Valued L p -Spaces

Quanhua Xu.

in International Mathematics Research Notices

January 2015; p ublished online July 2014 .

Journal Article. Subjects: Mathematics. 4509 words.

Let {T t } t>0 be a strongly continuous semigroup of positive contractions on L p (X,μ) with...

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Optimal control for linear discrete-time systems with Markov perturbations in Hilbert spaces

Viorica Mariela Ungureanu.

in IMA Journal of Mathematical Control and Information

March 2009; p ublished online March 2009 .

Journal Article. Subjects: Mathematics. 0 words.

In this article, we discuss a quadratic control problem for linear discrete-time systems with Markov perturbations in Hilbert spaces, which is linked to a discrete-time Riccati equation...

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Oscillations in lossless propagation models: a Liapunov–Krasovskii approach

Vladimir Răsvan and Silviu‐Iulian Niculescu.

in IMA Journal of Mathematical Control and Information

March 2002; p ublished online March 2002 .

Journal Article. Subjects: Mathematics. 0 words.

This paper focuses on Forced oscillations (periodic and almost periodic) in some dynamical models described by coupled differential and difference equations. The existence and stability...

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UNIQUENESS OF THE EXTENSION OF 2-HOMOGENEOUS POLYNOMIALS

P. Galindo and M. L. Lourenço.

in The Quarterly Journal of Mathematics

December 2010; p ublished online April 2009 .

Journal Article. Subjects: Pure Mathematics. 0 words.

Homogeneous polynomials of degree 2 on the complex Banach space c 0(ℓ n 2) are shown to have unique norm-preserving extension to the...

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COARSE AND UNIFORM EMBEDDINGS INTO REFLEXIVE SPACES

N. J. Kalton.

in The Quarterly Journal of Mathematics

September 2007; p ublished online June 2007 .

Journal Article. Subjects: Pure Mathematics. 0 words.

Abstract

Answering an old problem in nonlinear theory, we show that c 0 cannot be coarsely or uniformly embedded into a reflexive Banach space,...

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PROJECTIVITY OF BANACH AND C*-ALGEBRAS OF CONTINUOUS FIELDS

David Cushing and Zinaida A. Lykova.

in The Quarterly Journal of Mathematics

June 2013; p ublished online March 2012 .

Journal Article. Subjects: Pure Mathematics. 0 words.

We give necessary and sufficient conditions for the left projectivity and biprojectivity of Banach algebras defined by locally trivial continuous fields of Banach algebras. We identify...

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Gâteaux differentiability of Lipschitz functions

Joram Lindenstrauss, David Preiss and Tiˇser Jaroslav.

in Fréchet Differentiability of Lipschitz Functions and Porous Sets in Banach Spaces (AM-179)

February 2012; p ublished online October 2017 .

Chapter. Subjects: Mathematics. 4791 words.

This chapter presents the main results on Gâteaux differentiability of Lipschitz functions by recalling the notions of the Radon-Nikodým property (RNP) and null sets. The discussion focuses...

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The Oxford Handbook of Functional Data Analysis

Edited by Frédéric Ferraty and Yves Romain.

November 2010; p ublished online August 2018 .

Book. Subjects: Science and Mathematics. 514 pages.

This handbook presents the state-of-the-art of the statistics dealing with functional data analysis. With contributions from international experts in the field, it discusses a wide range of...

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Γ‎-Null and Γ‎N-Null Sets

Joram Lindenstrauss, David Preiss and Tiˇser Jaroslav.

in Fréchet Differentiability of Lipschitz Functions and Porous Sets in Banach Spaces (AM-179)

February 2012; p ublished online October 2017 .

Chapter. Subjects: Mathematics. 10215 words.

This chapter introduces the notions of Γ‎-null and Γ‎ₙ-null sets, which are σ‎-ideals of subsets of a Banach space X. Γ‎-null set is key for the strongest known general Fréchet...

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