M. H. Mortad

activity

20122024

most citedUnbounded Products of Operators and Connections to Dirac-Type Operators

17 citations · 64 across the 32 of their papers we have counts for

collaborators

Showing 2015Show all

2 papers · 1 filter

math.FA2015

Conditions Implying Commutativity of Unbounded Self-adjoint Operators and Related Topics

K. Gustafson, M. H. Mortad

Let $B$ be a bounded self-adjoint operator and let $A$ be a nonnegative self-adjoint unbounded operator. It is shown that if $B A$ is normal, it must be self-adjoint and so must be…

math.FA2015★ 2 cited

Right (Or Left) Invertibility of Bounded and Unbounded Operators and Applications to the Spectrum of Products

Mohammed Hichem Mortad, Souheyb Dehimi

This paper is mainly concerned with proving $σ (A B) = σ (B A)$ for two linear and non necessarily bounded operators $A$ and $B$ . The main tool is left and right invertibility of bounded…