Tikhonov Regularization is Optimal Transport Robust under Martingale Constraints
Tikhonov Regularization is Optimal Transport Robust under Martingale Constraints
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Tikhonov 正则化是鞅约束下的最优传输鲁棒性
DOI:
10.48550/arxiv.2210.01413
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Viet Anh Nguyen
中科院分区:
文献类型:
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作者:
Jiajin Li;Si;J. Blanchet;Viet Anh Nguyen
Distributionally robust optimization has been shown to offer a principled way to regularize learning models. In this paper, we find that Tikhonov regularization is distributionally robust in an optimal transport sense (i.e., if an adversary chooses distributions in a suitable optimal transport neighborhood of the empirical measure), provided that suitable martingale constraints are also imposed. Further, we introduce a relaxation of the martingale constraints which not only provides a unified viewpoint to a class of existing robust methods but also leads to new regularization tools. To realize these novel tools, tractable computational algorithms are proposed. As a byproduct, the strong duality theorem proved in this paper can be potentially applied to other problems of independent interest.
影响因子:
1
作者:
Blanchet, Jose;Kang, Yang;Murthy, Karthyek
通讯作者:
Murthy, Karthyek
DOI:
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发表时间:
2020-02
期刊:
ArXiv
影响因子:
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作者:
Zac Cranko;Zhan Shi;Xinhua Zhang;R. Nock;Simon Kornblith
通讯作者:
Zac Cranko;Zhan Shi;Xinhua Zhang;R. Nock;Simon Kornblith
DOI:
10.1287/moor.2021.1178
发表时间:
2018-10
期刊:
Math. Oper. Res.
影响因子:
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作者:
J. Blanchet;Karthyek Murthy;Fan Zhang
通讯作者:
J. Blanchet;Karthyek Murthy;Fan Zhang