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Adapted optimal transport between Gaussian processes in discrete time

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arxiv 2404.06625 v4 pith:6W3FBR4U submitted 2024-04-09 math.PR

classification math.PR
keywords adapteddistancegaussianoptimalbicausalbures-wassersteincharacterizecoupling
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abstract

We derive explicitly the adapted $2$-Wasserstein distance between non-degenerate Gaussian distributions on $\mathbb{R}^N$ and characterize the optimal bicausal coupling(s). This leads to an adapted version of the Bures-Wasserstein distance on the space of positive definite matrices.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Wasserstein Space of Stochastic Processes in Continuous Time

    math.PR 2025-01 conditional novelty 7.0 of 10

    In continuous time, the Aldous, Hoover-Keisler, Hellwig, and optimal-stopping topologies on naturally filtered processes coincide and are metrized by an adapted Wasserstein distance, whose completion is the space of g...

  2. Comparing noisy neural population dynamics using optimal transport distances

    q-bio.NC 2024-12 conditional novelty 6.0 of 10

    A causal optimal transport distance between Gaussian processes compares noisy neural trajectories using their full temporal statistics, capturing differences that mean-based and marginal-based metrics miss.

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