Computational Mathematics and Scientific Computing Seminar
Linear Multistep Methods for Learning Unknown Dynamics
Speaker: Qiang Du, Columbia University
Location: Warren Weaver Hall 1302
Date: April 1, 2022, 10 a.m.
Numerical integration of a given dynamic system can be viewed as a forward problem with the learning of unknown dynamics from available state observations as an inverse problem. The latter has been around in various settings such as model reductions of multiscale processes. It has received particular attention recently in the data-driven modeling via deep/machine learning. The solution of both forward and inverse problems forms the loop of informative and intelligent scientific
computing. A naturally related question is whether a good numerical integrator for discretizing prescribed dynamics is also good for discovering unknown dynamics in association with deep learning. This lecture presents a study in the context of linear multistep methods, revealing a less studied aspect of this classical numerical analysis subject.