Operators and Matrices · Volume 13, Issue 3 On the classes of (n,m)-power D-normal and (n,m)-power D-quasi-normal operators 13-51 Pages 705-732 DOI 10.7153/oam-2019-13-51 Downloads Short PDF Full PDF PNG Authors Sid Ahmed Ould Ahmed Mahmoud Ould Beinane Sid Ahmed Keywords (m,n)-power normal (m,n)-power quasi-normal n-power D-normal n-power D-quasi-normal Subject classes 47B15 47B20 47A15