Papers › Scalable Inference in SDEs by Direct Matching of the Fokker-Planck-Kolmogorov Equation

Scalable Inference in SDEs by Direct Matching of the Fokker-Planck-Kolmogorov Equation

29 Oct 2021NeurIPS 2021 12arXiv:2110.15739archive 2025-07-28

Arno Solin, Ella Tamir, Prakhar Verma

Simulation-based techniques such as variants of stochastic Runge-Kutta are the de facto approach for inference with stochastic differential equations (SDEs) in machine learning. These methods are general-purpose and used with parametric and non-parametric models, and neural SDEs. Stochastic Runge-Kutta relies on the use of sampling schemes that can be inefficient in high dimensions. We address this issue by revisiting the classical SDE literature and derive direct approximations to the (typically intractable) Fokker-Planck-Kolmogorov equation by matching moments. We show how this workflow is fast, scales to high-dimensional latent spaces, and is applicable to scarce-data applications, where a non-parametric SDE with a driving Gaussian process velocity field specifies the model.

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