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most citedThe Martingale Sinkhorn Algorithm

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math.PR2026

A weak transport approach to the Schrödinger-Bass bridge

Manuel Hasenbichler, Gudmund Pammer, Stefan Thonhauser

We study the Schrödinger-Bass problem, a one-parameter family of semimartingale optimal transport problems indexed by , whose limiting regimes interpolate between the classi…

math.PR2026

The geometry of the adapted Bures--Wasserstein space

Beatrice Acciaio, Daniel Bartl, Anne Grass +2

The adapted Bures--Wasserstein space consists of Gaussian processes endowed with the adapted Wasserstein distance. It can be viewed as the analogue of the classical Bures--Wasserst…

math.PR2025

A Brenier Theorem on and Applications to Adapted Transport

Mathias Beiglböck, Gudmund Pammer, Stefan Schrott

We develop Brenier theorems on iterated Wasserstein spaces. For a separable Hilbert space and , we construct a full-support probability on $P_2^{N}(H)= P_2(... P_…

math.PR2025

Estimating causal distances with non-causal ones

Beatrice Acciaio, Songyan Hou, Gudmund Pammer

The adapted Wasserstein () distance refines the classical Wasserstein () distance by incorporating the temporal structure of stochastic processes. This makes the -distan…

math.PR2025

Denseness of biadapted Monge mappings

Mathias Beiglböck, Gudmund Pammer, Stefan Schrott

Adapted or causal transport theory aims to extend classical optimal transport from probability measures to stochastic processes. On a technical level, the novelty is to restrict to…

math.PR2025

Strassen's theorem for biased convex order

Beatrice Acciaio, Mathias Beiglböck, Evgeny Kolosov +1

Strassen's theorem asserts that for given marginal probabilities there exists a martingale starting in and terminating in if and only if are in convex ord…