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Convergence Guarantees for RMSProp and Adam in Generalized-smooth Non-convex Optimization with Affine Noise Variance
April 3, 2024, 4:42 a.m. | Qi Zhang, Yi Zhou, Shaofeng Zou
cs.LG updates on arXiv.org arxiv.org
Abstract: This paper provides the first tight convergence analyses for RMSProp and Adam in non-convex optimization under the most relaxed assumptions of coordinate-wise generalized smoothness and affine noise variance. We first analyze RMSProp, which is a special case of Adam with adaptive learning rates but without first-order momentum. Specifically, to solve the challenges due to dependence among adaptive update, unbounded gradient estimate and Lipschitz constant, we demonstrate that the first-order term in the descent lemma converges …
abstract adam analyze arxiv assumptions case convergence cs.lg generalized math.oc noise optimization paper stat.ml type variance wise
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