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Regression analysis of distributional data through Multi-Marginal Optimal transport

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arxiv 2106.15031 v1 pith:SYI7QPHQ submitted 2021-06-28 eess.SY cs.SY

classification eess.SYcs.SY
keywords regressionwassersteinproblemspaceallowscurvesdatadistributional
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We formulate and solve a regression problem with time-stamped distributional data. Distributions are considered as points in the Wasserstein space of probability measures, metrized by the 2-Wasserstein metric, and may represent images, power spectra, point clouds of particles, and so on. The regression seeks a curve in the Wasserstein space that passes closest to the dataset. Our regression problem allows utilizing general curves in a Euclidean setting (linear, quadratic, sinusoidal, and so on), lifted to corresponding measure-valued curves in the Wasserstein space. It can be cast as a multi-marginal optimal transport problem that allows efficient computation. Illustrative academic examples are presented.

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Cited by 1 Pith paper

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  1. Principal Curves In Metric Spaces And The Space Of Probability Measures

    math.ST 2025-05 conditional novelty 8.0 of 10

    Introduces a consistent estimator for curves of probability measures in Wasserstein space, based on a length-penalized principal curve objective, and proves it recovers the ground-truth curve up to time reversal.

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