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On the Necessity of Collaboration in Online Model Selection with Decentralized Data
April 16, 2024, 4:42 a.m. | Junfan Li, Zenglin Xu, Zheshun Wu, Irwin King
cs.LG updates on arXiv.org arxiv.org
Abstract: We consider online model selection with decentralized data over $M$ clients, and study a fundamental problem: the necessity of collaboration. Previous work gave a negative answer from the perspective of worst-case regret minimization, while we give a different answer from the perspective of regret-computational cost trade-off. We separately propose a federated algorithm with and without communication constraint and prove regret bounds that show (i) collaboration is unnecessary if we do not limit the computational cost …
abstract arxiv case collaboration cs.lg data decentralized decentralized data model selection negative perspective study type work
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