Sharpness, Restart and Acceleration
Sharpness, Restart and Acceleration
复制标题
清晰度、重启和加速
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
A. d’Aspremont
中科院分区:
文献类型:
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作者:
Vincent Roulet;A. d’Aspremont
The Łojasievicz inequality shows that sharpness bounds on the minimum of convex optimization problems hold almost generically. Here, we show that sharpness directly controls the performance of restart schemes. The constants quantifying sharpness are of course unobservable, but we show that optimal restart strategies are fairly robust, and searching for the best scheme only increases the complexity by a logarithmic factor compared to the optimal bound. Overall then, restart schemes generically accelerate accelerated methods
DOI:
10.48550/arxiv.1609.07358
发表时间:
2016
期刊:
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影响因子:
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作者:
Fercoq O
通讯作者:
Fercoq O