Search Results for author: Nikolas Nüsken

Found 8 papers, 4 papers with code

From continuous-time formulations to discretization schemes: tensor trains and robust regression for BSDEs and parabolic PDEs

1 code implementation28 Jul 2023 Lorenz Richter, Leon Sallandt, Nikolas Nüsken

The numerical approximation of partial differential equations (PDEs) poses formidable challenges in high dimensions since classical grid-based methods suffer from the so-called curse of dimensionality.

Computational Efficiency

Transport meets Variational Inference: Controlled Monte Carlo Diffusions

1 code implementation3 Jul 2023 Francisco Vargas, Shreyas Padhy, Denis Blessing, Nikolas Nüsken

Connecting optimal transport and variational inference, we present a principled and systematic framework for sampling and generative modelling centred around divergences on path space.

Variational Inference

Interpolating between BSDEs and PINNs: deep learning for elliptic and parabolic boundary value problems

no code implementations7 Dec 2021 Nikolas Nüsken, Lorenz Richter

Solving high-dimensional partial differential equations is a recurrent challenge in economics, science and engineering.

Bayesian Learning via Neural Schrödinger-Föllmer Flows

no code implementations pproximateinference AABI Symposium 2022 Francisco Vargas, Andrius Ovsianas, David Fernandes, Mark Girolami, Neil D. Lawrence, Nikolas Nüsken

In this work we explore a new framework for approximate Bayesian inference in large datasets based on stochastic control (i. e. Schr\"odinger bridges).

Bayesian Inference

Stein Variational Gradient Descent: many-particle and long-time asymptotics

no code implementations25 Feb 2021 Nikolas Nüsken, D. R. Michiel Renger

Stein variational gradient descent (SVGD) refers to a class of methods for Bayesian inference based on interacting particle systems.

Bayesian Inference Variational Inference

VarGrad: A Low-Variance Gradient Estimator for Variational Inference

1 code implementation NeurIPS 2020 Lorenz Richter, Ayman Boustati, Nikolas Nüsken, Francisco J. R. Ruiz, Ömer Deniz Akyildiz

We analyse the properties of an unbiased gradient estimator of the ELBO for variational inference, based on the score function method with leave-one-out control variates.

Variational Inference

Solving high-dimensional Hamilton-Jacobi-Bellman PDEs using neural networks: perspectives from the theory of controlled diffusions and measures on path space

no code implementations11 May 2020 Nikolas Nüsken, Lorenz Richter

Optimal control of diffusion processes is intimately connected to the problem of solving certain Hamilton-Jacobi-Bellman equations.

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