Convergence of the Gradient Sampling Algorithm on Directionally Lipschitz Functions
Convergence of the Gradient Sampling Algorithm on Directionally Lipschitz Functions
复制标题
定向Lipschitz函数梯度采样算法的收敛性
DOI:
10.1007/s11228-021-00610-3
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Q. Lin
中科院分区:
文献类型:
--
作者:
J. V. Burke;Q. Lin
The convergence theory for the gradient sampling algorithm is extended to directionally Lipschitz functions. Although directionally Lipschitz functions are not necessarily locally Lipschitz, they are almost everywhere differentiable and well approximated by gradients and so are a natural candidate for the application of the gradient sampling algorithm. The main obstacle to this extension is the potential unboundedness or emptiness of the Clarke subdifferential at points of interest. The convergence analysis we present provides one path to addressing these issues. In particular, we recover the usual convergence theory when the function is locally Lipschitz. Moreover, if the algorithm does not drive a certain measure of criticality to zero, then the iterates must converge to a point at which either the Clarke subdifferential is empty or the direction of steepest descent is degenerate in the sense that it does lie in the interior of the domain of the regular subderivative.
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DOI:
10.1016/s1474-6670(17)35659-8
发表时间:
2003
期刊:
IFAC Proceedings Volumes
影响因子:
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