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arXiv 2004.14542math.OC
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圆盘矩阵与数值半径的近似映射

Disk matrices and the proximal mapping for the numerical radius

X. Y. Han, Adrian S. Lewis

摘要:

涉及矩阵数值半径的问题的最优矩阵通常具有圆盘形的值域,这是一种与部分光滑性相关的现象。这样的矩阵是高度结构化的:我们特别实验了半径的近似映射,它通常将n乘n的随机矩阵输入映射到具有实余维2n的圆盘矩阵的特定流形中。的输出,通过半定规划计算,也满足一个不寻常的排名最优性。

英文摘要:

Optimal matrices for problems involving the matrix numerical radius often have fields of values that are disks, a phenomenon associated with partial smoothness. Such matrices are highly structured: we experiment in particular with the proximal mapping for the radius, which often maps n-by-n random matrix inputs into a particular manifold of disk matrices that has real codimension 2n. The outputs, computed via semidefinite programming, also satisfy an unusual rank property at optimality.

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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