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cs.LG2026
Fully First-Order Algorithms for Online Bilevel Optimization
Tingkai Jia, Cheng Chen
In this work, we study nonconvex-strongly convex online bilevel optimization (OBO) using only first-order oracle. Existing OBO algorithms are mainly based on hypergradient descent,…
cs.LG2026
Achieving Better Local Regret Bound for Online Non-Convex Bilevel Optimization
Tingkai Jia, Haiguang Wang, Cheng Chen
Online bilevel optimization (OBO) has emerged as a powerful framework for many machine learning problems. Prior works have developed several algorithms that minimize the standard b…
cs.LG2023
Adversarial Attacks on Cooperative Multi-agent Bandits
Jinhang Zuo, Zhiyao Zhang, Xuchuang Wang +5
Cooperative multi-agent multi-armed bandits (CMA2B) consider the collaborative efforts of multiple agents in a shared multi-armed bandit game. We study latent vulnerabilities expos…