Involve, Volume (2), No (4), Year (2009-10) , Pages (469-476)

Title : ( Some numerical radius inequalities for Hilbert space operators )

Authors: محسن عرفانیان امیدوار , Mohammad Sal Moslehian , Asadollah Niknam ,
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Abstract

We present several numerical radius inequalities for Hilbert space operators. More precisely, we prove that if A;B;C;D 2 B.H/ and T D A C B D then max.w.A/;w.D// 1 2 .kT kCkT 2k1=2/ and max

Keywords

, bounded linear operator, Hilbert space, norm inequality, numerical radius, positive operator.