Found 22 Documents (Results 1–22)
Representation theorems for indefinite quadratic forms without spectral gap. (English) Zbl 1343.47002
Reviewer: Luca Giorgetti (Roma)
Non-existence of subordinate solutions for Jacobi operators in some critical cases. (English) Zbl 1287.47028
Reviewer: Aleksey Kostenko (Donetsk)
Dual operator algebras with normal virtual \(h\)-diagonal. (English) Zbl 1279.47096
Reviewer: Mixalis Anoussis (Samos)
The a priori \(\tan \Theta\) theorem for spectral subspaces. (English) Zbl 1276.47010
Reviewer: Ali-Akbar Jafarian (West Haven)
Numerical radius inequalities for certain \(2 \times 2\) operator matrices. (English) Zbl 1238.47004
Reviewer: Mohammad Sal Moslehian (Mashhad)
Algebraic order bounded disjointness preserving operators and strongly diagonal operators. (English) Zbl 1111.47033
Integral Equations Oper. Theory 54, No. 1, 9-31 (2006); erratum ibid. 75, No. 3, 443-444 (2013).
Reviewer: Şafak Alpay (Ankara) (MR 2006i:47070)
Algorithms for inversion of diagonal plus semiseparable operator matrices. (English) Zbl 1022.65063
Reviewer: Adhemar Bultheel (Leuven)
On operators \(T\) such that \(f(T)\) is hypercyclic. (English) Zbl 0983.46003
Reviewer: Jose Bonet (Valencia)
Linear complexity inversion algorithms for a class of structured matrices. (English) Zbl 0949.65021
Reviewer: Peter Reichensperger (Oberasbach)
On a new class of structured matrices. (English) Zbl 0934.15002
Reviewer: P.Narain (Bombay)
Finite-dimensional perturbations of selfadjoint operators. (English) Zbl 0959.47007
Reviewer: Boris V.Loginov (Ul’yanovsk)
Singular unitary dilations. (English) Zbl 0920.47006
Fast inversion algorithms for diagonal plus semiseparable matrices. (English) Zbl 0896.65025
Reviewer: F.Uhlig (Auburn)
Similarity of block diagonal and block triangular matrices. (English) Zbl 0769.15006
Reviewer: S.Sridhar (Madras)
MSC:
15A24
On approximation spectrum of bounded self-adjoint operators. (English) Zbl 0607.47002
Reviewer: T.Yoshino
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