


Paper's Title:
On operators for which T^{2}≥T^{*2}
Author(s):
Messaoud Guesba^{1} and Mostefa Nadir^{2}
^{1}Department
of Mathematics,
University of El Oued 39000,
Algeria
Email: guesbamessaoud2@gmail.com
^{2}Department of Mathematics,
University of Msila 28000,
Algeria
Email: mostefanadir@yahoo.fr
Abstract:
In this paper we introduce the new class of operators for which T^{2}≥ T^{*2} acting on a complex Hilbert space H. We give some basic properties of these operators. we study the relation between the class and some other well known classes of operators acting on H.
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