Consensus-based High Dimensional Global Non-convex Optimization in Machine Learning

Date: Friday, January 20, 2023:

Event: FAU DCN-AvH Seminar
Organized by: FAU DCN-AvH, Chair for Dynamics, Control and Numerics – Alexander von Humboldt Professorship at FAU, Friedrich-Alexander-Universität Erlangen-Nürnberg (Germany)
Title: FAU DCN-AvH Seminar “Consensus-based High Dimensional Global Non-convex Optimization in Machine Learning

Speaker: Prof. Dr. Shi Jin
Affiliation: Shanghai Jiao Tong University, China

Abstract. We introduce a stochastic interacting particle consensus system for global optimization of high dimensional non-convex functions. This algorithm does not use gradient of the function thus is suitable for non-smooth functions. We prove, for fully discrete systems, that under dimension-independent conditions on the parameters, with suitable initial data, the algorithms converge to the neighborhood of the global minimum almost surely. We also introduce an Adaptive Moment Estimation (ADAM) based version to significantly improve its performance in high-space dimension.



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