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Abstract
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International Journal of Mathematics and Mathematical Sciences
Volume 7 (1984), Issue 1, Pages 205-207
doi:10.1155/S0161171284000223

An operator inequality

P.D. Siafarikas

Department of Mathematics, Section of Applied Mathematics, University of Patra, Patra, Greece

Abstract

An inequality is proved in abstract separable Hilbert space H where A and B are bounded self-adjoint positive operators defined in H such that R(A)=R(B) and R(A) is closed.