Commutators of two operators one of which is unbounded and semi-normal
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The concept of semi-normality and hyponormality are defined for unbounded operators in Hilbert Space and Commutators AB-BA, with A unbounded and seminormal and with B bounded, are studied. Four theorems are proved. Two of them are generalizations of results of C. R. Putman.
KeywordsHilbert Space Unbounded Operator
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