Operators and Matrices · Volume 14, Issue 1 On the class of n-power D-m-quasi-normal operators on Hilbert spaces 14-13 Pages 159-174 DOI 10.7153/oam-2020-14-13 Downloads Short PDF Full PDF PNG Authors Beinane Sid Ahmed Sid Ahmed Ould Ahmed Mahmoud Keywords (n,m)-power normal (n,m)-power quasi-normal n-power D-normal n-power D-quasi-normal Subject classes 47B15 47B20 47A15