Improved SVRG for Non-Strongly-Convex or Sum-of-Non-Convex Objectives
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Publication:6262417
arXiv1506.01972MaRDI QIDQ6262417
Author name not available (Why is that?)
Publication date: 5 June 2015
Abstract: Many classical algorithms are found until several years later to outlive the confines in which they were conceived, and continue to be relevant in unforeseen settings. In this paper, we show that SVRG is one such method: being originally designed for strongly convex objectives, it is also very robust in non-strongly convex or sum-of-non-convex settings. More precisely, we provide new analysis to improve the state-of-the-art running times in both settings by either applying SVRG or its novel variant. Since non-strongly convex objectives include important examples such as Lasso or logistic regression, and sum-of-non-convex objectives include famous examples such as stochastic PCA and is even believed to be related to training deep neural nets, our results also imply better performances in these applications.
Has companion code repository: https://github.com/kul-forbes/CIAOAlgorithms.jl
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