International Journal of Mathematics and Mathematical Sciences
Volume 25 (2001), Issue 2, Pages 129-133
Some inequalities in
1University of Ondokuz Mayis, Faculty of Art and Sciences, Department of Mathematics, Samsun, Turkey
2100. Yil University, Faculty of Education, Department of Mathematics, Van, Turkey
Received 1 December 1998; Revised 15 November 1999
Copyright © 2001 C. Duyar and H. Seferoglu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Let denote a separable Hilbert space and let be the
space of bounded and linear operators from to . We define
a subspace of , and prove two inequalities
between the distance to of each operator in , and the value .