Mahmood Kamil Shihab

A Note on the Fuglede and Fuglede-Putnam’s Theorems

Mahmood Kamil Shihab · Journal of Advances in Mathematics and Computer Science · 2017

In this paper, we investigate the extension of Fuglede and Fuglede-Putnam’s Theorems to two bounded linear operators.

Open access Research Article 10.9734/JAMCS/2017/35982

Square-Normal Operator

Mahmood Kamil Shihab · Journal of Advances in Mathematics and Computer Science · 2016

In this paper we define a new class of operators in Hilbert space called square-normal operator and we give an example to show that the square-normal operator is not normal operator. We also consider the conditions on any operator to be a square-normal operator. Then we give a co...

Open access Research Article 10.9734/BJMCS/2016/28879