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On the Existence of Normal Square and Nth Roots of Operators (1801.06884v3)

Published 21 Jan 2018 in math.FA and math.OA

Abstract: The primary purpose of this paper is to show the existence of normal square and nth roots of some classes of bounded operators on Hilbert spaces. Two interesting simple results hold. Namely, under simple conditions we show that if any operator $T$ is such that $T2=0$, then this implies that $T$ is normal and so $T=0$. Also, we will see when the square root of an arbitrary bounded operator is normal.

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