Near-optimal Approximate Discrete and Continuous Submodular Function Minimization
Near-optimal Approximate Discrete and Continuous Submodular Function Minimization
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近最优近似离散和连续子模函数最小化
DOI:
10.1137/1.9781611975994.51
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Sidford, Aaron
中科院分区:
文献类型:
--
作者:
Axelrod, Brian;Liu, Yang P.;Sidford, Aaron
In this paper we provide improved running times and oracle complexities for approximately minimizing a submodular function. Our main result is a randomized algorithm, which given any submodular function defined onn-elements with range [–1, 1], computes an ε-additive approximate minimizer inÕ(n/ε2) oracle evaluations with high probability. This improves over theÕ(n5/3/ε2) oracle evaluation algorithm of Chakrabartyet al. (STOC 2017) and theÕ(n3/2/ε2) oracle evaluation algorithm of Hamoudiet al…Further, we leverage a generalization of this result to obtain efficient algorithms for minimizing a broad class of nonconvex functions. For any functionfwith domain [0, 1]nthat satisfies for alli≠jand isL-Lipschitz with respect to theL∞-norm we give an algorithm that computes anε-additive approximate minimizer withÕ(n ·poly(L/ε) function evaluation with high probability.
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DOI:
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发表时间:
2019-06
期刊:
ArXiv
影响因子:
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DOI:
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期刊:
International Conference on Machine Learning
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DOI:
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期刊:
Comb.
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2017
期刊:
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通讯作者:
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DOI:
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发表时间:
2010
期刊:
Computer Vision: Detection, Recognition and Reconstruction
影响因子:
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