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Reverse Cauchy--Schwarz inequalities for positive C*-valued sesquilinear forms

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arxiv 0905.4065 v1 pith:QI5V7CBU submitted 2009-05-25 math.OA math.FA

classification math.OAmath.FA
keywords cauchy--schwarzinequalitiesreversepositivesesquilinearadditivealgebraapply
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We prove two new reverse Cauchy--Schwarz inequalities of additive and multiplicative types in a space equipped with a positive sesquilinear form with values in a C*-algebra. We apply our results to get some norm and integral inequalities. As a consequence, we improve a celebrated reverse Cauchy--Schwarz inequality due to G Polya and G. Szego.

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