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fuglede-putnam type theorems for extension of ∗-class a operators
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نویسنده
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rashid mohammad h.m.
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منبع
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international journal of nonlinear analysis and applications - 2022 - دوره : 13 - شماره : 2 - صفحه:863 -873
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چکیده
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In this article, we consider k-quasi-∗-class a operator t ∈ b(h) such that t x = xs for some x ∈ b(k, h) and prove the fuglede-putnam type theorem when adjoint of s ∈ b(k) is k-quasi-∗-class a or dominant operators. among other things, we prove that two quasisimilar k-quasi-∗-class a operators have equal essential spectra.
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کلیدواژه
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fuglede-putnam theorem ,∗-class a operators ,k-quasi-∗-class a operators ,quasisimilar operators
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آدرس
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mu’tah university, faculty of science, department of mathematics & statistics, jordan
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پست الکترونیکی
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malik_okasha@yahoo.com
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Authors
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