Abstract:\scrB (\scrH ) will denote the algebra of all bounded linear operators on a complex Hilbert space \scrH . In [6], the authors proved that natural power of a posinormal operator is not in general posinormal. Precisely, they constructed an example of a posinormal operator with square not being posinormal. Given a positive integer n, the aim of this article is to study a class of operators in \scrB (\scrH ) called n-power-posinormal. This class is invariant under natural power and contains any natural power of an… Show more
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