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William Desmond Evans
Researcher at Cardiff University
Publications - 117
Citations - 4010
William Desmond Evans is an academic researcher from Cardiff University. The author has contributed to research in topics: Essential spectrum & Operator theory. The author has an hindex of 26, co-authored 117 publications receiving 3764 citations. Previous affiliations of William Desmond Evans include University of Sussex & University of London.
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The HELP Inequality for Hamiltonian Systems
Journal Article
Some spectral properties of Rooms and Passages domains and their skeletons
TL;DR: In this paper, the spectral properties of Laplacians on rooms and passages domains were investigated using Dirichlet-Neumann bracketing and Sturm-Liouville operators on the skeleton.
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On the evaluation of the norm of an integral operator associated with the stability of one-electron atoms
TL;DR: In this article, the norm of an integral operator occurring in the partial wave decomposition of an operator B introduced by Brown and Ravenhall in a model for relativistic one-electron atoms is determined.
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5.—Semi-bounded Dirichlet Integrals and the Invariance of the Essential Spectra of Self-adjoint Operators
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Selfadjoint and $m$ sectorial extensions of Sturm-Liouville operators
TL;DR: In this article, the self-adjoint and $m$-sectorial extensions of coercive Sturm-Liouville operators are characterized under minimal smoothness conditions on the coefficients of the differential expression.