Proximal langevin algorithm: Rapid convergence under isoperimetry

A Wibisono - arxiv preprint arxiv:1911.01469, 2019 - arxiv.org
We study the Proximal Langevin Algorithm (PLA) for sampling from a probability distribution
$\nu= e^{-f} $ on $\mathbb {R}^ n $ under isoperimetry. We prove a convergence guarantee …

Wasserstein distance estimates for the distributions of numerical approximations to ergodic stochastic differential equations

JM Sanz-Serna, KC Zygalakis - Journal of Machine Learning Research, 2021 - jmlr.org
We present a framework that allows for the non-asymptotic study of the 2-Wasserstein
distance between the invariant distribution of an ergodic stochastic differential equation and …

The reproducing Stein kernel approach for post-hoc corrected sampling

L Hodgkinson, R Salomone, F Roosta - arxiv preprint arxiv:2001.09266, 2020 - arxiv.org
Stein importance sampling is a widely applicable technique based on kernelized Stein
discrepancy, which corrects the output of approximate sampling algorithms by reweighting …

HMC and underdamped Langevin united in the unadjusted convex smooth case

N Gouraud, PL Bris, A Majka, P Monmarché - arxiv preprint arxiv …, 2022 - arxiv.org
We consider a family of unadjusted generalized HMC samplers, which includes standard
position HMC samplers and discretizations of the underdamped Langevin process. A …

Stochastic normalizing flows

L Hodgkinson, C van der Heide, F Roosta… - arxiv preprint arxiv …, 2020 - arxiv.org
We introduce stochastic normalizing flows, an extension of continuous normalizing flows for
maximum likelihood estimation and variational inference (VI) using stochastic differential …

Stochastic continuous normalizing flows: training SDEs as ODEs

L Hodgkinson, C van der Heide… - Uncertainty in …, 2021 - proceedings.mlr.press
We provide a general theoretical framework for stochastic continuous normalizing flows, an
extension of continuous normalizing flows for density estimation of stochastic differential …

Accelerated Bayesian imaging by relaxed proximal-point Langevin sampling

T Klatzer, P Dobson, Y Altmann, M Pereyra… - SIAM Journal on Imaging …, 2024 - SIAM
This paper presents a new accelerated proximal Markov chain Monte Carlo methodology to
perform Bayesian inference in imaging inverse problems with an underlying convex …

Ergodicity of Langevin Dynamics and its Discretizations for Non-smooth Potentials

L Fruehwirth, A Habring - arxiv preprint arxiv:2411.12051, 2024 - arxiv.org
This article is concerned with sampling from Gibbs distributions $\pi (x)\propto e^{-U (x)} $
using Markov chain Monte Carlo methods. In particular, we investigate Langevin dynamics …

Convergence of Noise-Free Sampling Algorithms with Regularized Wasserstein Proximals

F Han, S Osher, W Li - arxiv preprint arxiv:2409.01567, 2024 - arxiv.org
In this work, we investigate the convergence properties of the backward regularized
Wasserstein proximal (BRWP) method for sampling a target distribution. The BRWP …

Parallel simulation for sampling under isoperimetry and score-based diffusion models

H Zhou, M Sugiyama - arxiv preprint arxiv:2412.07435, 2024 - arxiv.org
In recent years, there has been a surge of interest in proving discretization bounds for
sampling under isoperimetry and for diffusion models. As data size grows, reducing the …