17 citations · 64 across the 32 of their papers we have counts for
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math.FA2013★ 17 cited
Unbounded Products of Operators and Connections to Dirac-Type Operators
Karl Gustafson, Mohammed Hichem Mortad
Let and be two densely defined unbounded closeable operators in a Hilbert space such that their unbounded operator products and are also densely defined. Then all…
math.FA2013
A Criterion for the Normality of Unbounded Operators and Applications to Self-adjointness
Mohammed Hichem Mortad
In this paper we give and prove a criterion for the normality of unbounded closed operators, which is a sort of a maximality result which will be called "double maximality". As app…
math.FA2013★ 11 cited
Commutativity of Unbounded Normal and Self-adjoint Operators and Applications
Mohammed Hichem Mortad
Devinatz, Nussbaum and von Neumann established some important results on the strong commutativity of self-adjoint and normal unbounded operators. In this paper, we prove results in…