Special Session 126: Machine Learning and New Framework for Solving Partial Differential Equations

Weak Generative Sampler to Solve High - Dimensional PDEs for Stochastic Models: Efficiency and Adaptivity
Xiang ZHOU
City University of Hong Kong
Hong Kong
Co-Author(s):    Zhiqiang CAI, Yu CAO, Yuanfei Huang
Abstract:
The solution of many typical high-dimensional PDEs (such as the Fokker-Planck, and McKean-Vlasov equations) is associated with a probability distribution. To solve such PDEs by deep learning techniques is usually to simply find a neural network for the density function itself, subject to certain positivity and normalization conditions. The further utilization of the solution requires random sampling again. We introduce a framework of Weak Generative Sampler (WGS) to both solve the PDE and generate samples more efficiently than the PINN and the Ritz method. Our proposed loss function is based on the weak form and the generic probability interpretation of the loss function. The details of this talk will explain why the efficiency and adaptivity are so easy to achieve in this WGS for high-dimensional PDEs.