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A Single-Loop Algorithm for Decentralized Bilevel Optimization
April 24, 2024, 4:43 a.m. | Youran Dong, Shiqian Ma, Junfeng Yang, Chao Yin
cs.LG updates on arXiv.org arxiv.org
Abstract: Bilevel optimization has gained significant attention in recent years due to its broad applications in machine learning. This paper focuses on bilevel optimization in decentralized networks and proposes a novel single-loop algorithm for solving decentralized bilevel optimization with a strongly convex lower-level problem. Our approach is a fully single-loop method that approximates the hypergradient using only two matrix-vector multiplications per iteration. Importantly, our algorithm does not require any gradient heterogeneity assumption, distinguishing it from existing …
abstract algorithm applications arxiv attention cs.dc cs.lg decentralized loop machine machine learning math.oc networks novel optimization paper type
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