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arXiv 2011.13683math.OC
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一般凸函数正则化的最优输运问题:几何和算法方法

Optimal transport problems regularized by generic convex functions: A geometric and algorithmic approach

Daiji Tsutsui

摘要:

为了规避数值求解离散最优输运问题(其中最小化线性目标函数$P\mapsto\langle C,P\rangle:=\sum_{i,j}C_{ij}P_{ij}$)的困难,Cuturi引入了该问题的一个变体,其中目标函数被凸函数改变为$Φ(P)=\langle C,P\rangle-λ\mathcal{H}(P)$,其中$\mathcal{H}$是香农熵,而$λ$是正常数。本文将其公式推广到形式为$Φ(P)=\langle C,P\rangle+λf(P)$的目标函数,其中$f$是一般的严格凸光滑函数。我们还提出了一种迭代方法,找到一个数值解,并澄清,所提出的方法是特别有效的时,$f(P)=\frac{1}{2}\|P\|^2$。

英文摘要:

In order to circumvent the difficulties in solving numerically the discrete optimal transport problem, in which one minimizes the linear target function $P\mapsto\langle C,P\rangle:=\sum_{i,j}C_{ij}P_{ij}$, Cuturi introduced a variant of the problem in which the target function is altered by a convex one $Φ(P)=\langle C,P\rangle-λ\mathcal{H}(P)$, where $\mathcal{H}$ is the Shannon entropy and $λ$ is a positive constant. We herein generalize their formulation to a target function of the form $Φ(P)=\langle C,P\rangle+λf(P)$, where $f$ is a generic strictly convex smooth function. We also propose an iterative method for finding a numerical solution, and clarify that the proposed method is particularly efficient when $f(P)=\frac{1}{2}\|P\|^2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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