O. Ahmed

collaborators

2 papers

math.FA2016

On a joint $(m, (q_{1}, ..., q_{d}))$ -partial isometries and a joint $m$ -invertible $d$ -tuple of operators on a Hilbert space

Ould Ahmed Mahmoud Sid Ahmed

The aim of the present paper is, firstly we study the concepts of (m, (q_1, ..., q_d))- partial isometries on a Hilbert space, secondly, we introduce the notion of m- invertibility…

math.FA2016

Generalizations of Kaplansky Theorem for some (p,k)-Quasihyponormal Operators

Abdelkader Benali, Ould Ahmed Mahmoud Sid Ahmed

In the present paper, we generalized some notions of bounded operators to un- bounded operators on Hilbert space such as k-quasihyponormal and k-paranormal unbounded operators. Fur…

On a joint (m,(q1​,...,qd​))-partial isometries and a joint m-invertible d-tuple of operators on a Hilbert space

Generalizations of Kaplansky Theorem for some (p,k)-Quasihyponormal Operators

On a joint $(m, (q_{1}, ..., q_{d}))$ -partial isometries and a joint $m$ -invertible $d$ -tuple of operators on a Hilbert space