THE EXPONENTIAL FORMULA FOR THE WASSERSTEIN METRIC
THE EXPONENTIAL FORMULA FOR THE WASSERSTEIN METRIC
复制标题
瓦瑟斯坦度量的指数公式
DOI:
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
Katy Craig
中科院分区:
文献类型:
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作者:
Katy Craig
A recurring obstacle in the study of Wasserstein gradient flow is the lack of convexity of the square Wasserstein metric. In this paper, we develop a class of transport metrics that have better convexity properties and use these metrics to prove an Euler−Lagrange equation characterizing Wasserstein discrete gradient flow. We then apply these results to give a new proof of the exponential formula for the Wasserstein metric, mirroring Crandall and Liggett’s proof of the corresponding Banach space result [M.G. Crandall and T.M. Liggett, Amer. J. Math. 93 (1971) 265–298]. We conclude by using our approach to give simple proofs of properties of the gradient flow, including the contracting semigroup property and energy dissipation inequality.