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arXiv 2203.04020math.OCcs.MA
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分布式optimization的小批量随机三算子分裂

Mini-batch stochastic three-operator splitting for distributed optimization

Barbara Franci, Mathias Staudigl

摘要:

我们考虑一个网络的代理人,每个都有自己的私人成本组成的两个可能的非光滑凸函数,其中之一是由一个线性算子的总和。在每次迭代中,每个代理执行本地计算,并且只能与其邻居通信。我们的研究具有挑战性的方面是,私人费用函数的平滑部分作为一个期望值和代理只能访问这部分的问题制定通过一个重尾随机预言。为了解决这种基于采样的最优化问题,我们提出了一个随机扩展的三角预条件原始对偶法。我们证明了该格式的几乎必然收敛,并通过数值实验验证了该方法的性能。

英文摘要:

We consider a network of agents, each with its own private cost consisting of a sum of two possibly nonsmooth convex functions, one of which is composed with a linear operator. At every iteration each agent performs local calculations and can only communicate with its neighbors. The challenging aspect of our study is that the smooth part of the private cost function is given as an expected value and agents only have access to this part of the problem formulation via a heavy-tailed stochastic oracle. To tackle such sampling-based optimization problems, we propose a stochastic extension of the triangular pre-conditioned primal-dual algorithm. We demonstrate almost sure convergence of the scheme and validate the performance of the method via numerical experiments.

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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