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On the linear convergence of the multi-marginal Sinkhorn algorithm

Carlier, Guillaume (2021), On the linear convergence of the multi-marginal Sinkhorn algorithm. https://basepub.dauphine.psl.eu/handle/123456789/22372

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linear-sinkhorn.pdf (199.9Kb)
Type
Document de travail / Working paper
External document link
https://hal.archives-ouvertes.fr/hal-03176512
Date
2021
Series title
Cahier de recherche du CEREMADE
Pages
10
Metadata
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Author(s)
Carlier, Guillaume
CEntre de REcherches en MAthématiques de la DEcision [CEREMADE]
Abstract (EN)
The aim of this short note is to give an elementary proof of linear convergence of the Sinkhorn algorithm for the entropic regularization of multi-marginal optimal transport. The proof simply relies on: i) the fact that Sinkhorn iterates are bounded, ii) strong convexity of the exponential on bounded intervals and iii) the convergence analysis of the coordinate descent (Gauss-Seidel) method of Beck and Tetruashvili [1].
Subjects / Keywords
Block coordinate descent; Linear convergence; Sinkhorn algorithm; Multi-marginal entropic optimal transport

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