Journal of Inequalities and Applications 
Volume 3 (1999), Issue 3, Pages 279-284
doi:10.1155/S1025583499000181

Powers of p-Hyponormal operators

Ariyadasa Aluthge1 and Derming Wang2

 1Department of Mathematics, Marshall University, Huntington 25755-2560, WV, USA
2Department of Mathematics, California State University, Long Beach 90840-1001, CA, USA
Received 20 November 1997; Revised 9 July 1998

Abstract

Applying Furuta’s and Hansen’s inequalities, it is shown that if T is a p-hyponormal operator, then Tn is (p/n)-hyponormal. Applications are obtained.