时间：2024年7月11日（星期四）14:30-16:00
地点：西湖大学云谷校区E4-233
主持人： 理论科学研究院 魏传豪
主讲人：上海交通大学 罗涛
报告主题：Geometry and Local Recovery of Global Minima of Two-layer Neural Networks at Overparameterization
报告摘要: In this talk, we investigate the geometry of the loss landscape for two-layer neural networks in the vicinity of global minima. Utilizing novel techniques, we demonstrate: (i) how global minima with zero generalization error become geometrically separated from other global minima as the sample size grows; and (ii) the local convergence properties and rate of gradient flow dynamics. Our results indicate that two-layer neural networks can be locally recovered in the regime of overparameterization.
