Operator maps of Jensen-type
Operator maps of Jensen-type
复制标题
Jensen型算子图
DOI:
10.1007/s11117-018-0571-8
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发表时间:
2018
期刊:
影响因子:
1
通讯作者:
Najafi Hamed
中科院分区:
文献类型:
--
作者:
Hansen Frank;Moslehian Mohammad Sal;Najafi Hamed
Letdenote the set of self-adjoint operators acting on a Hilbert spacewith spectra contained in an open intervalJ. A mapis said to be of Jensen-type if $$\begin{aligned} \Phi (C^*AC+D^*BD)\le C^*\Phi (A)C+D^*\Phi (B)D \end{aligned}$$for alland bounded linear operatorsC,Dacting onwith, whereIdenotes the identity operator. We show that a Jensen-type map on an infinite dimensional Hilbert space is of the formfor some operator convex functionfdefined inJ.