UtafutajiSchool of Science Kwa Somo "Skew n-binormal operator, quasi n-normal operator and unitary invariance"
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On Unitary Invariance of Some Classes of Operators in Hilbert Spaces
(Pure Mathematical Sciences, 2020)It 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. However, under the stronger relation of unitary equivalence ...