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Robust SDE-Based Variational Formulations for Solving Linear PDEs via Deep Learning

  • The combination of Monte Carlo methods and deep learning has recently led to efficient algorithms for solving partial differential equations (PDEs) in high dimensions. Related learning problems are often stated as variational formulations based on associated stochastic differential equations (SDEs), which allow the minimization of corresponding losses using gradient-based optimization methods. In respective numerical implementations it is therefore crucial to rely on adequate gradient estimators that exhibit low variance in order to reach convergence accurately and swiftly. In this article, we rigorously investigate corresponding numerical aspects that appear in the context of linear Kolmogorov PDEs. In particular, we systematically compare existing deep learning approaches and provide theoretical explanations for their performances. Subsequently, we suggest novel methods that can be shown to be more robust both theoretically and numerically, leading to substantial performance improvements.

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Metadaten
Author:Lorenz Richter, Julius Berner
Document Type:In Proceedings
Parent Title (English):Proceedings of the 39th International Conference on Machine Learning, PMLR
Volume:162
First Page:18649
Last Page:18666
Fulltext Url:https://proceedings.mlr.press/v162/richter22a.html
Year of first publication:2022
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