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math.FA2019
Harnack parts for some truncated shifts
Gilles Cassier, Mohammed Benharrat
The purpose of this paper is to analysis the Harnack part of some truncated shifts whose -numerical radius equal one in the finite dimensional case. As pointed out in Theorem 1.…
math.SP2019
Right and left quotient of two bounded operators on Hilbert spaces
Mohammed Benharrat
We define a left quotient as well as a right quotient of two bounded operators between Hilbert spaces, and we parametrize these two concepts using the Moore-Penrose inverse. In par…