arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.03546math.OCcs.SYeess.SY
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基于连续时间的算法的下界

Continuous-time Lower Bounds for Gradient-based Algorithms

Michael Muehlebach, Michael I. Jordan

摘要:

本文推导了连续时间梯度优化算法的收敛速度的下界。该算法受到时间归一化约束,避免了重新参数化的时间,以使连续时间的收敛速度的讨论有意义。我们减少了多维的问题,一个单一的维度,恢复众所周知的下界从离散时间设置,并提供洞察为什么这些下界发生。我们提出的算法,实现建议的下界,即使考虑的函数类包括某些非凸函数。

英文摘要:

This article derives lower bounds on the convergence rate of continuous-time gradient-based optimization algorithms. The algorithms are subjected to a time-normalization constraint that avoids a reparametrization of time in order to make the discussion of continuous-time convergence rates meaningful. We reduce the multi-dimensional problem to a single dimension, recover well-known lower bounds from the discrete-time setting, and provide insight into why these lower bounds occur. We present algorithms that achieve the proposed lower bounds, even when the function class under consideration includes certain nonconvex functions.

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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