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arXiv 2208.03025math.OCcs.NAmath.NA
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基于成对代价的高效精确多边缘最优传输

Efficient and Exact Multimarginal Optimal Transport with Pairwise Costs

Bohan Zhou, Matthew Parno

AI总结:

针对成对代价多边缘最优传输缺乏高效精确数值方法的问题,证明其等价于树表示问题,提出基于对偶梯度的有根树求解算法,得到可用于无正则化场景的精确解。

摘要:

本文研究成对代价下多边缘最优传输(MMOT)的数值求解问题。MMOT作为经典两边缘最优传输的自然扩展,在图像处理、密度泛函理论、机器学习等领域有重要应用,但目前缺乏高效精确的数值方法。常用的熵正则化方法存在数值不稳定和模糊问题。受Jacobs和Léger提出的往返法启发,本文研究成对代价的MMOT问题:首先,这类问题具有图表示形式,本文证明其等价于具有树表示的MMOT问题;其次,提出一种新算法,通过对偶形式的梯度法求解有根树上的MMOT;最后,得到的精确解可应用于无正则化的场景。

英文摘要:

In this paper, we address the numerical solution to the multimarginal optimal transport (MMOT) with pairwise costs. MMOT, as a natural extension from the classical two-marginal optimal transport, has many important applications including image processing, density functional theory and machine learning, but yet lacks efficient and exact numerical methods. The popular entropy-regularized method may suffer numerical instability and blurring issues. Inspired by the back-and-forth method introduced by Jacobs and Léger, we investigate MMOT problems with pairwise costs. First, such problems have a graphical representation and we prove equivalent MMOT problems that have a tree representation. Second, we introduce a noval algorithm to solve MMOT on a rooted tree, by gradient based method on the dual formulation. Last, we obtain accurate solutions which can be used for the regularization-free applications.

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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