Some inequalities for norm ideals

Bhatia, Rajendra (1987) Some inequalities for norm ideals Communications in Mathematical Physics, 111 (1). pp. 33-39. ISSN 0010-3616

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Official URL: http://www.springerlink.com/index/V74H482277288723...

Related URL: http://dx.doi.org/10.1007/BF01239013

Abstract

Several inequalities for norms of operators are extended to more operators and/or to more norms. These include results of Halmos and Bouldin on approximating a normal operator by another with restricted spectrum, the Powers-Stormer and the van Hemmen-Ando inequalities for the distance between the square roots of two positive operators and also some recent generalisations of these latter results by Kittaneh.

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