报告题目：Lax pairs informed neural networks solving integrable systems

报告人：陈勇教授

摘要：Lax pairs are one of the most important features of integrable system. In this talk, we propose the Lax pairs informed neural networks (LPINNs) tailored for integrable systems with Lax pairs by designing novel network architectures and loss functions, comprising LPINN-v1 and LPINN-v2. The most noteworthy advantage of LPINN-v1 is that it can transform the solving of complex integrable systems into the solving of a simpler Lax pairs to simplify the study of integrable systems, and it not only efficiently solves data-driven localized wave solutions, but also obtains spectral parameters and corresponding spectral functions in Lax pairs. On the basis of LPINN-v1, we additionally incorporate the compatibility condition/zero curvature equation of Lax pairs in LPINN-v2, its major advantage is the ability to solve and explore high-accuracy data-driven localized wave solutions and associated spectral problems for all integrable systems with Lax pairs. The numerical experiments in this work involve several important and classic low-dimensional and high-dimensional integrable systems, abundant localized wave solutions and their Lax pairs , including the soliton of the KdV equation and mKdV equation, rogue wave solution of the NLS equation, kink solution of the sine-Gordon equation, non-smooth peakon solution of the Camassa-Holm equation and pulse solution of the short pulse equation, as well as the line-soliton solution KP equation and lump solution of high-dimensional KdV equation. The innovation of this work lies in the pioneering integration of Lax pairs informed of integrable systems into deep neural networks, thereby presenting a fresh methodology and pathway for investigating data-driven localized wave solutions and spectral problems of Lax pairs.

报告人简介：陈勇，华东师范大学教授，博士生导师，上海市闵行区拔尖人才.长期从事非线性数学物理、可积系统、计算机代数及程序开发、可积深度学习算法，混沌理论、大气和海洋动力学等领域的研究工作。提出了一系列可以机械化实现非线性方程求解的方法，发展了李群理论并成功应用

时间：2024年3月23日（星期六），11:00-12:00

地点：数学楼2-1会议室