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arXiv 1207.5201math.FAmath.OA
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用不等式刻画单调性

Characterization of the monotonicity by the inequality

Dinh Trung Hoa, Hiroyuki Osaka, Jun Tomiyama

摘要:

设$φ$是Hilbert空间$H$上所有有界算子的代数$B(H)$上的正规态,$f$是$(0, \infty)$上的严格正连续函数,$g$是由$g(t) = \frac{t}{f(t)}$定义的$(0, \infty)$上的函数.我们将通过以下推广的Powers-St \ormer不等式给出矩阵和算子单调性的刻画:当$A, B$是$B(H).$中的正可逆算子时,$$ φ(A + B) - φ(|A - B|) \leq 2φ(f(A)^1/2g(B)f(A)^1/2), $$

英文摘要:

Let $φ$ be a normal state on the algebra $B(H)$ of all bounded operators on a Hilbert space $H$, $f$ a strictly positive, continuous function on $(0, \infty)$, and let $g$ be a function on $(0, \infty)$ defined by $g(t) = \frac{t}{f(t)}$. We will give characterizations of matrix and operator monotonicity by the following generalized Powers-St\ormer inequality: $$ φ(A + B) - φ(|A - B|) \leq 2φ(f(A)^1/2g(B)f(A)^1/2), $$ whenever $A, B$ are positive invertible operators in $B(H).$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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