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arXiv 1502.03123math.OC
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一个通用的原始-对偶凸优化框架

A Universal Primal-Dual Convex Optimization Framework

Alp Yurtsever, Quoc Tran-Dinh, Volkan Cevher

摘要:

我们提出了一个新的原始-对偶算法框架的原型约束凸优化模板。我们的框架的算法实例是通用的,因为它们可以自动适应未知的霍尔德连续度和常数的对偶公式。他们也保证有最佳的收敛速度的目标残差和可行性差距为每个霍尔德平滑度。与现有的原始对偶法相比,我们的框架避免了目标函数的邻近算子。相反,我们利用计算成本更低的Fenchel型算子,这是广义条件梯度(GCG)型方法的主要工具。与GCG类方法相比,该框架不要求目标函数是可微的,并且可以处理额外的一般线性包含约束,同时保证了原问题的收敛速度

英文摘要:

We propose a new primal-dual algorithmic framework for a prototypical constrained convex optimization template. The algorithmic instances of our framework are universal since they can automatically adapt to the unknown Holder continuity degree and constant within the dual formulation. They are also guaran- teed to have optimal convergence rates in the objective residual and the feasibility gap for each Holder smoothness degree. In contrast to existing primal-dual algorithms, our framework avoids the proximity operator of the objective function. We instead leverage computationally cheaper, Fenchel-type operators, which are the main workhorses of the generalized conditional gradient (GCG)-type methods. In contrast to the GCG-type methods, our framework does not require the objective function to be differentiable, and can also process additional general linear inclusion constraints, while guarantees the convergence rate on the primal problem

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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