Practical Frank-Wolfe algorithms
Practical Frank-Wolfe algorithms
复制标题
实用 Frank-Wolfe 算法
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
V. Kolmogorov
中科院分区:
文献类型:
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作者:
V. Kolmogorov
In the last decade there has been a resurgence of interest in Frank-Wolfe (FW) style methods for optimizing a smooth convex function over a polytope. Examples of recently developed techniques include {em Decomposition-invariant Conditional Gradient} (DiCG), {em Blended Condition Gradient} (BCG), and {em Frank-Wolfe with in-face directions} (IF-FW) methods. We introduce two extensions of these techniques. First, we augment DiCG with the {em working set} strategy, and show how to optimize over the working set using {em shadow simplex steps}. Second, we generalize in-face Frank-Wolfe directions to polytopes in which faces cannot be efficiently computed, and also describe a generic recursive procedure that can be used in conjunction with several FW-style techniques. Experimental results indicate that these extensions are capable of speeding up original algorithms by orders of magnitude for certain applications.
DOI:
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发表时间:
2020
期刊:
Advances in neural information processing systems
影响因子:
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作者:
Mortagy, H;Gupta, S;Pokutta, S
通讯作者:
Pokutta, S