Schrödinger operators with δ and δ′-potentials supported on hypersurfaces [PDF]
, 2013 Self-adjoint Schrödinger operators with δ and δ′-potentials supported on a smooth compact hypersurface are defined explicitly via boundary conditions.
Lotoreichik, Vladimir +2 more
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Optimal extensions of compactness properties for operators on Banach function spaces [PDF]
, 2015 Compactness type properties for operators acting in Banach function spaces are not always preserved when the operator is extended to a bigger space. Moreover, it is known that there exists a maximal (weakly) compact linear extension of a (weakly) compact
Jiménez Fernández, Eduardo +6 more
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Unbounded B-Fredholm operators on Hilbert spaces [PDF]
, 2008 This paper is concerned with the study of a class of closed linear operators densely defined on a Hilbert space H and called B-Fredholm operators.
Berkani, M. +3 more
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An extension theorem in SBV and an application to the homogenization of the Mumford-Shah functional in perforated domains [PDF]
, 2011 The aim of this paper is to prove the existence of extension operators for SBV functions from periodically perforated domains.
Filippo Cagnetti (4464373) +7 more
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The discrete fragmentation equations : semigroups, compactness and asynchronous exponential growth [PDF]
, 2012 In this paper we present a class of fragmentation semigroups which are compact in a scale of spaces defined in terms of finite higher moments. We use this compactness result to analyse the long time behaviour of such semigroups and, in particular, to ...
Banasiak, Jacek, Lamb, Wilson
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Extrapolation of compactness on weighted spaces : Bilinear operators [PDF]
, 2022 In a previous paper, we obtained several "compact versions" of Rubio de Francia's weighted extrapolation theorem, which allowed us to extrapolate the compactness of linear operators from just one space to the full range of weighted Lebesgue spaces, where
Lappas, Stefanos +3 more
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Compactness in asymmetrically normed lattices. [PDF]
, 2012 Includes abstract.Includes bibliographical references.The aim of the thesis is to investigate aspects of the theory of such spaces, concentrating mainly, but not exclusively, on nite dimensional spaces.
Mabula, Mokhwetha Daniel
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Maximal ideals in the algebra of operators on certain Banach spaces. [PDF]
, 2002 For a Banach space $\mathfrak{X}$, let $\mathcal{B}(\mathfrak{X})$ denote the Banach algebra of all continuous linear operators on $\mathfrak{X}$. First, we study the lattice of closed ideals in $\mathcal{B}(\mathfrak{J}_p)$, where $1 < p < \infty$ and $\
Laustsen, Niels J.
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Compactness and collective compactness in spaces of compact operators
, 1981 This is a study of compactness in (a) spaces Kb(X, Y) of compact linear operators, (b) injective tensor products X \̃boϵ Y, and (c) spaces Lc(X, Y) of continuous linear operators, and its various relationships with equicontinuity and collective ...
Ruess, Wolfgang
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Approximation by pseudo-linear operators [PDF]
, 2008 The approximation operators provided by classical approximation theory use exclusively as underlying algebraic structure the linear structure of the reals. Also they are all linear operators.
NOBUHARA H +7 more
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