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arXiv 2008.04191math.OC
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求解非凸Optimization三阶临界点的自适应高阶方法

An Adaptive High Order Method for Finding Third-Order Critical Points of Nonconvex Optimization

Xihua Zhu, Jiangze Han, Bo Jiang

摘要:

众所周知,对于非凸优化问题,寻找一个全局最优值是非常具有挑战性的。\cite{anandkumar2016efficient, cartis2018second, cartis2020sharp, chen2019high}是一种计算高阶临界点的最优化方法,它可以排除所谓的退化鞍点,得到质量更好的解。由于\cite{anandkumar2016efficient, cartis2018second, cartis2020sharp, chen2019high}理论发展缓慢,相应的数值实验还很缺乏。在本文中,我们提出了一个可实现的高阶方法,称为自适应高阶方法(AHOM),旨在寻找三阶临界点。这是通过解决一个“的”subproblem,并将自适应策略的参数调整在算法的每次迭代。建立了该方法的迭代复杂度。一些初步的数值结果表明,AHOM是能够逃脱退化鞍点,在二阶方法可能会卡住。

英文摘要:

It is well known that finding a global optimum is extremely challenging for nonconvex optimization. There are some recent efforts \cite{anandkumar2016efficient, cartis2018second, cartis2020sharp, chen2019high} regarding the optimization methods for computing higher-order critical points, which can exclude the so-called degenerate saddle points and reach a solution with better quality. Desipte theoretical development in \cite{anandkumar2016efficient, cartis2018second, cartis2020sharp, chen2019high}, the corresponding numerical experiments are missing. In this paper, we propose an implementable higher-order method, named adaptive high order method (AHOM), that aims to find the third-order critical points. This is achieved by solving an ``easier'' subproblem and incorporating the adaptive strategy of parameter-tuning in each iteration of the algorithm. The iteration complexity of the proposed method is established. Some preliminary numerical results are provided to show AHOM is able to escape the degenerate saddle points, where the second-order method could possibly get stuck.

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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