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Sobhan Mohammadpour

4 accepted papers

2026

Learning Correlated Reward Models: Statistical Barriers and Opportunities

ICLR 2026poster

Random Utility Models (RUMs) are a classical framework for modeling user preferences and play a key role in reward modeling for Reinforcement Learning from Human Feedback (RLHF). However, a crucial shortcoming of many of these techniques is the Independence of Irrelevant Alternatives (IIA) assumptio…

Cited by 0SourcecodeScholar
2026

Reevaluating Policy Gradient Methods for Imperfect-Information Games

ICLR 2026poster

In the past decade, motivated by the putative failure of naive self-play deep reinforcement learning (DRL) in adversarial imperfect-information games, researchers have developed numerous DRL algorithms based on fictitious play (FP), double oracle (DO), and counterfactual regret minimization (CFR). I…

Cited by 0SourcecodeScholar
2024

Maximum entropy GFlowNets with soft Q-learning

AISTATS 2024poster

Generative Flow Networks (GFNs) have emerged as a powerful tool for sampling discrete objects from unnormalized distributions, offering a scalable alternative to Markov Chain Monte Carlo (MCMC) methods. While GFNs draw inspiration from maximum entropy reinforcement learning (RL), the connection betw…

Cited by 15SourcePDFScholar