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arXiv 1708.07620math.OC
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时变网络上分布式凸优化的Fenchel对偶梯度法

Fenchel Dual Gradient Methods for Distributed Convex Optimization over Time-varying Networks

Xuyang Wu, Jie Lu

摘要:

在现有的大量凸多智能体优化分布式算法中,只有少数算法能保证智能体网络在时变拓扑下的收敛速度,而这又限制了问题的无约束性.出于这一动机,我们开发了一个家庭的分布式Fenchel双梯度法解决约束,强凸,但不一定光滑的多智能体最优化问题随时间变化的无向网络。所提出的算法构造的基础上应用加权梯度法的Fenchel对偶的多智能体最优化问题,并可以实现在一个完全分散的方式。我们表明,所提出的算法驱动所有的代理原始和对偶最优渐近下的最小连通性条件和次线性速率下的标准连通性条件。最后,通过仿真验证了分布式Fenchel对偶梯度法的良好收敛性能.

英文摘要:

In the large collection of existing distributed algorithms for convex multi-agent optimization, only a handful of them provide convergence rate guarantees on agent networks with time-varying topologies, which, however, restrict the problem to be unconstrained. Motivated by this, we develop a family of distributed Fenchel dual gradient methods for solving constrained, strongly convex but not necessarily smooth multi-agent optimization problems over time-varying undirected networks. The proposed algorithms are constructed based on the application of weighted gradient methods to the Fenchel dual of the multi-agent optimization problem, and can be implemented in a fully decentralized fashion. We show that the proposed algorithms drive all the agents to both primal and dual optimality asymptotically under a minimal connectivity condition and at sublinear rates under a standard connectivity condition. Finally, the competent convergence performance of the distributed Fenchel dual gradient methods is demonstrated via simulations.

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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