Subnormal nth roots of quasinormal operators are quasinormal

Pietrzycki, P; Stochel, J

Stochel, J (corresponding author), Uniwersytet Jagiellonski, Wydzial Matematyki & Informatyki, Ul Ojasiewicza 6, PL-30348 Krakow, Poland.

JOURNAL OF FUNCTIONAL ANALYSIS, 2021; 280 (12):

Abstract

In a recent paper [11], R.E. Curto, S.H. Lee and J. Yoon asked the following question. Let A be a subnormal operator, and assume that A(2) is quasinor......

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