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A new majorization between functions, polynomials, and operator inequalities
Authors:Mitsuru Uchiyama
Institution:Department of Mathematics, Fukuoka University of Education, Munakata, Fukuoka 811-4192, Japan
Abstract:Let P+ be the set of all non-negative operator monotone functions defined on 0,∞), and put View the MathML source. Then View the MathML source and View the MathML source. For a function View the MathML source and a strictly increasing function h we write View the MathML source if View the MathML source is operator monotone. If View the MathML source and View the MathML source and if View the MathML source and View the MathML source, then View the MathML source. We will apply this result to polynomials and operator inequalities. Let View the MathML source and View the MathML source be non-increasing sequences, and put View the MathML source for ta1 and View the MathML source for tb1. Then v+?u+ if mn and View the MathML source: in particular, for a sequence View the MathML source of orthonormal polynomials, (pn-1)+?(pn)+. Suppose 0<r,p and s=0 or 1≦s≦1+p/r. Then 0≦AB implies View the MathML source for 0<αr/(p+r).
Keywords:Matrix order    wner-Heinz inequality  Operator monotone function  Pick function  Orthogonal polynomial  Majorization
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