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arXiv 1801.04782math.OC
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线性约束非光滑极小化问题的块坐标原对偶方法

Block-coordinate primal-dual method for the nonsmooth minimization over linear constraints

D. Russell Luke, Yura Malitsky

摘要:

本文研究了一类受线性约束的凸可分非光滑函数的极小化问题。我们提出的数值方法是Chambolle-Pock原始对偶法的块坐标扩展。我们证明了该方法的收敛性,而不诉诸假设,如光滑或强凸的目标,满秩条件的矩阵,强对偶性,甚至一致性的线性系。自由强加后一个假设允许收敛保证错误指定或嘈杂的系统。

英文摘要:

We consider the problem of minimizing a convex, separable, nonsmooth function subject to linear constraints. The numerical method we propose is a block-coordinate extension of the Chambolle-Pock primal-dual algorithm. We prove convergence of the method without resorting to assumptions like smoothness or strong convexity of the objective, full-rank condition on the matrix, strong duality or even consistency of the linear system. Freedom from imposing the latter assumption permits convergence guarantees for misspecified or noisy systems.

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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