The fast track to Loewner's theorem

The fast track to Loewner's theorem
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洛纳定理的快速通道

DOI:
10.1016/j.laa.2013.01.022
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发表时间:
2013
影响因子:
1.1
通讯作者:
Frank Hansen
Frank Hansen
中科院分区:
数学3区
文献类型:
--
作者:
Koji Kikuchi;Koji Kikuchi;Koji Kikuchi;Koji Kikuchi;菊地光嗣;菊地光嗣;Edward Effros and Frank Hansen;Frank Hansen;Frank Hansen;Frank Hansen;Frank Hansen

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定义在正半直线上的算子单调函数是特别重要的。我们给出了一个版本的理论,其中积分表示这些功能可以直接建立没有调用Löwner的详细分析矩阵单调函数的一个固定的顺序或理论的解析函数。我们发现了定义在正半直线上的正算子单调函数和任意算子单调函数之间的一个典范关系,这一结果有效地将理论简化到了正函数的情形.
The operator monotone functions defined in the positive half-line are of particular importance. We give a version of the theory in which integral representations for these functions can be established directly without invoking Löwner’s detailed analysis of matrix monotone functions of a fixed order or the theory of analytic functions. We found a canonical relationship between positive and arbitrary operator monotone functions defined in the positive half-line, and this result effectively reduces the theory to the case of positive functions.