On submajorization and eigenvalue inequalities

Rajarama Bhat, B.V. ; Chattopadhyay, Arup ; Kosuru, G. Sankara Raju (2015) On submajorization and eigenvalue inequalities Linear and Multilinear Algebra, 63 (11). pp. 2245-2253. ISSN 0308-1087

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Official URL: http://doi.org/10.1080/03081087.2014.1000817

Related URL: http://dx.doi.org/10.1080/03081087.2014.1000817

Abstract

Let be the algebra of complex matrices and let be a completely positive map. Suppose is a self-adoint matrix. We prove a submajorization result concerning positive and negative parts of the spectrum of . As a consequence, we obtain inequalities concerning the smallest and the largest eigenvalues of the Schur product of and , where and are self-adjoint.

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