Differential analysis of matrix convex functions II

Differential analysis of matrix convex functions II
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矩阵凸函数的微分分析II

DOI:
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发表时间:
2007
期刊:
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影响因子:
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通讯作者:
J. Tomiyama
J. Tomiyama
中科院分区:
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文献类型:
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作者:
Frank Hansen;J. Tomiyama

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我们在[F]中继续分析。汉森和J.富山,矩阵凸函数的微分分析。Linear Algebra Appl.,420:102-116,2007]的矩阵凸函数的一个固定的顺序定义在一个真实的区间通过微分方法,而不是由克劳斯给出的除差方面的特征。本文对已有文献中的一些观点进行了修正和改进,并给出了矩阵低阶凸性的一些简单而重要的结论。
We continue the analysis in [F. Hansen, and J. Tomiyama, Differential analysis of matrix convex functions. Linear Algebra Appl. , 420:102–116, 2007] of matrix convex functions of a fixed order defined in a real interval by differential methods as opposed to the characterization in terms of divided differences given by Kraus. We amend and improve some points in the previously given presentation, and we give a number of simple but important consequences of matrix convexity of low orders.