Results 11 to 20 of about 2,806 (244)
Overlapping Schwarz methods with GenEO coarse spaces for indefinite and non-self-adjoint problems [PDF]
IMA Journal of Numerical Analysis, 2021 Generalized eigenvalue problems on the overlap(GenEO) is a method for computing an operator-dependent spectral coarse space to be combined with local solves on subdomains to form a robust parallel domain decomposition preconditioner for elliptic PDEs ...
N. Bootland +4 more
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Self-Adjoint Extensions of Dirac Operator with Coulomb Potential [PDF]
, 2017 In this note we give a concise review of the present state-of-art for the problem of self-adjoint realisations for the Dirac operator with a Coulomb-like singular scalar potential V (x) = ϕ(x)I4.
M. Gallone
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Study of a self-adjoint operator indicating the direction of time within standard quantum mechanics [PDF]
, 2011 In [Y. Strauss, Self-adjoint Lyapunov variables, temporal ordering and irreversible representations of Schrodinger evolution, J. Math. Phys. 51 (2010) 022104] a self-adjoint operator was introduced that has the property that it indicates the direction of
Yossef Strauss +5 more
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Compressions of Self-Adjoint Extensions of a Symmetric Operator and M.G. Krein’s Resolvent Formula
Integral equations and operator theory, 2018 Let S be a symmetric operator with finite and equal defect numbers in the Hilbert space $${{\mathfrak {H}}}$$H. We study the compressions $$P_{{\mathfrak {H}}}\widetilde{A}\big |_{{\mathfrak {H}}}$$PHA~|H of the self-adjoint extensions $$\widetilde{A}$$A~
A. Dijksma, H. Langer
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Bounds on the spectrum and reducing subspaces of a J-self-adjoint operator [PDF]
, 2009 Given a self-adjoint involution J on a Hilbert space H, we consider a J-self-adjoint operator L=A+V on H where A is a possibly unbounded self-adjoint operator commuting with J and V a bounded J-self-adjoint operator anti-commuting with J.
S. Albeverio +2 more
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Computing spectral measures of self-adjoint operators [PDF]
SIAM Review, 2020 Using the resolvent operator, we develop an algorithm for computing smoothed approximations of spectral measures associated with self-adjoint operators.
Matthew J. Colbrook +2 more
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EXTENSION OF TENSOR PRODUCT FOR OPERATORS ON THE DIRAC OPERATOR EXAMPLE [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2014 The paper deals with extension method for the operator which is a sum of tensor products. Boundary triplets approach is used. One of the operators is considered to be densely defined and symmetric with equal deficiency indices, the other one is ...
A. A. Boitsev, H. Neidhardt, I. Y. Popov
doaj
Results in Applied Mathematics, 2020 The interior elastic transmission eigenvalue problem, arising from the inverse scattering theory of non-homogeneous elastic media, is nonlinear, non-self-adjoint and of fourth order.
Xia Ji, Peijun Li, Jiguang Sun
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Models of Self-Adjoint and Unitary Operators in Pontryagin Spaces
Современная математика: Фундаментальные направления, 2022 This paper represents a revised version of the lectures, delivered by the author at KROMSH-2019. These lectures are devoted to describing a few different ways of constructing a model representation for self-adjoint and unitary operators acting in ...
V. A. Strauss
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On Some bounded Operators and their characterizations in Г-Hilbert Space
Cumhuriyet Science Journal, 2020 Some bounded operators are part of this paper.Through this paper we shall obtain common properties of Some bounded operators in Г-Hilbert space. Also, introduced 2-self-adjoint operators and it’s spectrum in Г-Hilbert Space.
Sahın Injamamul Islam
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