Results 51 to 60 of about 96,721 (176)
On Some Sampling-Related Frames in U-Invariant Spaces
Abstract and Applied Analysis, 2013 This paper is concerned with the characterization as frames of some sequences in U-invariant spaces of a separable Hilbert space ℋ where U denotes an unitary operator defined on ℋ; besides, the dual frames having the same form are also found.
H. R. Fernández-Morales +3 more
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Инвариантные подпространства в функциональных пространствах медленного роста на световом конусе в R^3 [PDF]
Проблемы анализа, 2011 В функциональных топологических векторных пространствах медленного роста на световом конусе X в R 3 получено полное описание строения всех замкнутых линейных подпространств, инвариантных относительно естественного квазирегулярного представления группы R ⊗
Платонов С. С.
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On the solvability of a system of wave and beam equations
Abstract and Applied Analysis, 2001 We prove new existence results for linearly coupled system of wave and beam equations. The main concept is the matrix spectrum which is a natural extension of standard definition.
Juha Berkovits
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Projections on invariant subspaces [PDF]
Proceedings of the American Mathematical Society, 1962 and the arguments x are understood to be real numbers modulo 27. It is clear that H' is a closed subspace of Ll. D. J. Newman has shown quite recently [3] that there exist no bounded projections of L' onto H1. (By a projection we mean a linear operator P such that P2= P.) Certain facts about H' suggest a rather general setting for this type of theorem.
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Ergodicity Breaking Arising from Hilbert Space Fragmentation in Dipole-Conserving Hamiltonians
Physical Review X, 2020 We show that the combination of charge and dipole conservation—characteristic of fracton systems—leads to an extensive fragmentation of the Hilbert space, which, in turn, can lead to a breakdown of thermalization.
Pablo Sala +4 more
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Static Output Feedback Stabilization using Invariant Subspaces and Sylvester Equations
Trends in Computational and Applied Mathematics, 2009 This paper presents systematic computational algorithms for obtaining the output feedback gain matrix in linear systems stabilization problems. Based on the concept of (C,A,B)-invariant subspaces, introduced previously by the first author, that has ...
E.R.L Villareal +2 more
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Fixed Point Theory and Applications, 2007 Some properties of the linear continuous operator and separation of convex subsets are investigated in this paper and a dual space for a subspace of a reflexive Banach space with a strictly convex norm is constructed.
Soltanov Kamal N
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Nonsolvable Subalgebras of gl(4,R)
Journal of Mathematics, 2016 All the simple and then semisimple subalgebras of gl(4,R) are found. Each such semisimple subalgebra acts by commutator on gl(4,R). In each case the invariant subspaces are found and the results are used to determine all possible subalgebras of gl(4,R ...
Ryad Ghanam, Gerard Thompson
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Invariant Subspaces for Derivations [PDF]
Proceedings of the American Mathematical Society, 1988 In this article it is proved that most of the known sufficient conditions for a subspace from Lat A \mathcal {A} to be hyperinvariant are in fact also sufficient for this subspace to be invariant for all operators from Ad A \mathcal {A} .
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On the weak limit of compact operators on the reproducing kernel Hilbert space and related questions
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016 By applying the so-called Berezin symbols method we prove a Gohberg- Krein type theorem on the weak limit of compact operators on the non- standard reproducing kernel Hilbert space which essentially improves the similar results of Karaev [5]: We also in ...
Saltan Suna
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