Results 61 to 69 of about 431 (69)
Fuglede-Putnam's theorem for w-hyponormal operators
, 2012 A. Bachir, F. Lombarkia
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A trace inequality for non-commuting hyponormal tuples
International Journal of Mathematical Analysis, 2022We introduce the class of almost right hyponormal and almost jointly hyponormal multi-operators and give a sufficient condition for some “commutator” associated to such multi-operators to belong to the trace class.
Vasile Lauric
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On unitary invariance of some classes of operators in Hilbert spaces
, 2020It is a known fact in operator theory that two similar operators have equal spectra but they do not necessarily have to belong to the same class of operators.
L. Muhati, J. M. Khalagai
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Sarajevo Journal of Mathematics
Let $H$ be a separable complex Hilbert space and let $B(H)$ denote the algebra of all bounded linear operators on $H.$ If $T$ is a quasi-normal Fredholm operator we prove that $TT^*\in (QD)(P_n)$ if and only if $T^*T\in (QD)(P_n).$ We also show that if ...
M. Lohaj, S. Lohaj
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Let $H$ be a separable complex Hilbert space and let $B(H)$ denote the algebra of all bounded linear operators on $H.$ If $T$ is a quasi-normal Fredholm operator we prove that $TT^*\in (QD)(P_n)$ if and only if $T^*T\in (QD)(P_n).$ We also show that if ...
M. Lohaj, S. Lohaj
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International Journal of Mathematical Analysis, 2019
In this paper we introduce the class of skew n-binormal operators acting on an Hilbert space . An operator T ∈ B(H) is skew n-binormal operator if it satisfies the condition (T ∗TnTnT ∗)T = T (TnT ∗T ∗Tn).
K. Rasimi +3 more
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In this paper we introduce the class of skew n-binormal operators acting on an Hilbert space . An operator T ∈ B(H) is skew n-binormal operator if it satisfies the condition (T ∗TnTnT ∗)T = T (TnT ∗T ∗Tn).
K. Rasimi +3 more
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An asymmetric Putnam-Fuglede theorem for (p,k)-quasiposinormal operators
, 2016A. Bachir, M. Altanji
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Disintegration‐of‐measure techniques for commuting multivariable weighted shifts
, 2006R. Curto, Jasang Yoon
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Some range-kernel orthogonality results for generalized derivation
, 2018A. Bachir, Nadiah Zafer Al-Shehri
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Commutators of almost normal operators that have trace zero
, 2015Vasile Lauric
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