The fast track to Loewner's theorem
The fast track to Loewner's theorem
复制标题
洛纳定理的快速通道
DOI:
10.1016/j.laa.2013.01.022
复制
发表时间:
2013
影响因子:
1.1
通讯作者:
Frank Hansen
中科院分区:
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
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.