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47A55

37 articles

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Article	Title	Journal	Published
OaM-18-13	Relative residual bounds for eigenvalues in gaps of the essential spectrum Albrecht Seelmann	OaM Operators and Matrices	Volume 18, Issue 1 03/2024
JMI-18-10	Non-linear Casazza-Kalton-Christensen-van Eijndhoven perturbation with applications K. Mahesh Krishna	JMI Journal of Mathematical Inequalities	Volume 18, Issue 1 03/2024
OaM-17-70	The essential spectrum equalities of 2×2 unbounded upper triangular operator matrices XinRan Liu, Deyu Wu	OaM Operators and Matrices	Volume 17, Issue 4 12/2023
OaM-17-57	Some inequalities related to numerical radius and distance from scalar operators in Hilbert spaces Mohamed Chraibi Kaadoud, El Hassan Benabdi, Messaoud Guesba	OaM Operators and Matrices	Volume 17, Issue 3 09/2023
OaM-16-46	k-quasi-A-paranormal operators in semi-Hilbertian spaces Messaoud Guesba, Sid Ahmed Ould Ahmed Mahmoud	OaM Operators and Matrices	Volume 16, Issue 3 09/2022
OaM-16-17	Expansive operators which are power bounded or algebraic B. P. Duggal, In Hyoun Kim	OaM Operators and Matrices	Volume 16, Issue 1 03/2022
OaM-15-74	Unifying the treatment of indefinite and semidefinite perturbations in the subspace perturbation problem Albrecht Seelmann	OaM Operators and Matrices	Volume 15, Issue 3 09/2021
OaM-15-35	A Bishop-Phelps-Bollobás type property for minimum attaining operators Neeru Bala, G. Ramesh	OaM Operators and Matrices	Volume 15, Issue 2 06/2021
OaM-15-28	Closedness of ranges of unbounded upper triangular operator matrices Yaru Qi, Junjie Huang, Alatancang Chen	OaM Operators and Matrices	Volume 15, Issue 2 06/2021
OaM-14-65	Explicit Krein resolvent identities for singular Sturm-Liouville operators with applications to Bessel operators S. Blake Allan, Justin Hanbin Kim, Gregory Michajlyszyn, Roger Nichols, Don Rung	OaM Operators and Matrices	Volume 14, Issue 4 12/2020
OaM-14-06	Inverse continuity of the numerical range map for Hilbert space operators Brian Lins, Ilya M. Spitkovsky	OaM Operators and Matrices	Volume 14, Issue 1 03/2020
OaM-13-67	Isolated eigenvalues, poles and compact perturbations of Banach space operators B. P. Duggal	OaM Operators and Matrices	Volume 13, Issue 4 12/2019
OaM-13-28	Compact perturbations of Drazin invertible operators Boting Jia, Youling Feng	OaM Operators and Matrices	Volume 13, Issue 2 06/2019
OaM-12-69	Weyl's theorem and its perturbations for the functions of operators Xiaohong Cao, Jiong Dong, Junhui Liu	OaM Operators and Matrices	Volume 12, Issue 4 12/2018
OaM-12-46	Hyponormality of finite rank perturbations of normal operators Il Bong Jung, Eun-Young Lee, Minjung Seo	OaM Operators and Matrices	Volume 12, Issue 3 09/2018
OaM-12-41	On the denseness of minimum attaining operators S. H. Kulkarni, G. Ramesh	OaM Operators and Matrices	Volume 12, Issue 3 09/2018
OaM-12-21	Hypercyclicity and Weyl type theorems for operator matrices Il Ju An, Jaeseong Heo	OaM Operators and Matrices	Volume 12, Issue 2 06/2018
OaM-12-06	Estimates on singular values of functions of perturbed operators Qinbo Liu	OaM Operators and Matrices	Volume 12, Issue 1 03/2018
OaM-11-32	Inequalities for eigenvalues of compactly perturbed unitary operators M. I. Gil'	OaM Operators and Matrices	Volume 11, Issue 2 06/2017
OaM-11-08	A bound for the Hilbert-Schmidt norm of generalized commutators of nonself-adjoint operators M. I. Gil'	OaM Operators and Matrices	Volume 11, Issue 1 03/2017
OaM-10-25	Finite rank perturbations and solutions to the operator Riccati equation Julian P. Großmann	OaM Operators and Matrices	Volume 10, Issue 2 06/2016
OaM-10-07	Generic rank-two perturbations of structured regular matrix pencils Leonhard Batzke	OaM Operators and Matrices	Volume 10, Issue 1 03/2016
OaM-09-30	Spectral points of type π₊ and type π_- of closed operators in indefinite inner product spaces Friedrich Philipp, Carsten Trunk	OaM Operators and Matrices	Volume 9, Issue 3 09/2015
OaM-08-38	Rank-one perturbations of normal operators and hyponormality Il Bong Jung, Eun-Young Lee	OaM Operators and Matrices	Volume 8, Issue 3 09/2014
OaM-08-11	Essential spectra of some matrix operators by means of measures of weak noncompactness Boulbeba Abdelmoumen	OaM Operators and Matrices	Volume 8, Issue 1 03/2014