Title: Provably convergent quasistatic dynamics for mean-field two-player zero-sum games
Speaker: Lexing Ying (Stanford University)
Speaker's URL: https://web.stanford.edu/~lexing/
Abstract: We study the minimax problem arising from finding the mixed Nash equilibrium for mean-field two-player zero-sum games. Solving this problem requires optimizing over two probability distributions. We consider a quasistatic Wasserstein gradient flow dynamics in which one probability distribution follows the Wasserstein gradient flow, while the other one is always at the equilibrium. Theoretical analysis are conducted on this dynamics, showing its convergence to the mixed Nash equilibrium under mild conditions. Inspired by the continuous dynamics of probability distributions, we derive a quasistatic Langevin gradient descent method with inner-outer iterations, and test the method on different problems, including training mixture of GANs.
URL associated with Seminar: https://people.math.osu.edu/xing.205/seminar.html
Zoom: https://osu.zoom.us/j/99118833389?pwd=UHc4a2o3VnJUZUdRK08xZ1p5clZXUT09
