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Xuezhou Zhang

3 papers hereh-index 335 citations7 works total

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author position
  • middle author1
  • last author2

Across the 3 of 3 papers where every author was matched, so the position is known.

fields
  • cs.LG3
same name
  • Xuezhou Zhang — 2 papers, h 2

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

collaborators

3 papers

cs.LG2026

When Can You Poison Rewards? A Tight Characterization of Reward Poisoning in Linear MDPs

Jose Efraim Aguilar Escamilla, Haoyang Hong, Jiawei Li +4

We study reward poisoning attacks in reinforcement learning (RL), where an adversary manipulates rewards within constrained budgets to force the target RL agent to adopt a policy t…

cs.LG2025

Avoiding exp(Rmax​) scaling in RLHF through Preference-based Exploration

Mingyu Chen, Yiding Chen, Wen Sun +1

Reinforcement Learning from Human Feedback (RLHF) has emerged as a pivotal technique for large language model (LLM) alignment. This paper studies the setting of online RLHF and foc…

cs.LG2025

Accelerating RL for LLM Reasoning with Optimal Advantage Regression

Kianté Brantley, Mingyu Chen, Zhaolin Gao +4

Reinforcement learning (RL) has emerged as a powerful tool for fine-tuning large language models (LLMs) to improve complex reasoning abilities. However, state-of-the-art policy opt…

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