Results 31 to 40 of about 582,641 (301)
Proper contractions and invariant subspaces
International Journal of Mathematics and Mathematical Sciences, 2001 Let T be a contraction and A the strong limit of {T∗nTn}n≥1. We prove the following theorem: if a hyponormal contraction T does not have a nontrivial invariant subspace, then T is either a proper contraction of class 𝒞00 or a nonstrict proper contraction
C. S. Kubrusly, N. Levan
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Constrained characteristic functions, multivariable interpolation, and invariant subspaces
Journal of Inequalities and Applications, 2020 In this paper, we present a functional model theorem for completely non-coisometric n-tuples of operators in the noncommutative variety V f , φ , I ( H ) $\mathcal{V}_{f,\varphi,\mathcal{I}}(\mathcal{H})$ in terms of constrained characteristic functions.
Jian Hu, Maofa Wang, Wei Wang
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Group-invariant Subspace Clustering [PDF]
2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2015 Proceedings of Allerton ...
Shuchin Aeron, Eric Kernfeld
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Invariant subspaces for H2 spaces of σ ‐finite algebras [PDF]
, 2016 We show that a Beurling type theory of invariant subspaces of noncommutative H2 spaces holds true in the setting of subdiagonal subalgebras of σ ‐finite von Neumann algebras.
L. Labuschagne
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Convergence of Restarted Krylov Subspaces to Invariant Subspaces [PDF]
SIAM Journal on Matrix Analysis and Applications, 2004 The authors prove estimates for the angle (strictly spoken: for the containment gap) between a searched invariant subspace of a general \(n\times n\) matrix and the subspace generated by Krylov subspace methods like the Arnoldi algorithm or the biorthogonal Lanczos algorithm.
Christopher Beattie +2 more
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Generalized 𝑆(𝐶,𝐴,𝐵)-Pairs for Uncertain Linear Infinite-Dimensional Systems
Journal of Applied Mathematics, 2009 We introduce the concept of generalized 𝑆(𝐶,𝐴,𝐵)-pairs which is related to generalized 𝑆(𝐴,𝐵)-invariant subspaces and generalized 𝑆(𝐶,𝐴)-invariant subspaces for infinite-dimensional systems.
Naohisa Otsuka, Haruo Hinata
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Monomial codes seen as invariant subspaces
Open Mathematics, 2017 It is well known that cyclic codes are very useful because of their applications, since they are not computationally expensive and encoding can be easily implemented. The relationship between cyclic codes and invariant subspaces is also well known.
García-Planas María Isabel +2 more
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CP symmetry and symplectic modular invariance
SciPost Physics, 2021 We analyze CP symmetry in symplectic modular-invariant supersymmetric theories. We show that for genus $g\ge 3$ the definition of CP is unique, while two independent possibilities are allowed when $g\le 2$.
Gui-Jun Ding, Ferruccio Feruglio, Xiang-Gan Liu
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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}
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Invariant subspaces of the shift plus complex Volterra operator [PDF]
, 2015 The lattice of closed invariant subspaces of the Volterra operator acting on $L^2(0,1)$ was completely described by Sarason. On the other hand, he explicitly found the lattice of closed invariant subspaces of the shift plus Volterra operator on $L^2(0,1)$
vZeljko vCuvckovi'c, B. Paudyal
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