Department of Mathematics,
University of California San Diego
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Math 278C: Optimization and Data Science
Dr. Lexiao Lai
Columbia University
Global stability of first-order methods for coercive tame functions
Abstract:
We consider first-order methods with constant step size for minimizing locally Lipschitz coercive functions that are tame in an o-minimal structure on the real field. We prove that if the method is approximated by subgradient trajectories, then the iterates eventually remain in a neighborhood of a connected component of the set of critical points. Under suitable method-dependent regularity assumptions, this result applies to the subgradient method with momentum, the stochastic subgradient method with random reshuffling and momentum, and the random-permutations cyclic coordinate descent method.
Host: Jiawang Nie
October 4, 2023
3:00 PM
APM 7321
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