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Robert Loftin

5 accepted papers

2026

How Does the Lagrangian Guide Safe Reinforcement Learning through Diffusion Models?

ICML 2026poster

Diffusion policy sampling enables reinforcement learning (RL) to represent multimodal action distributions beyond suboptimal unimodal Gaussian policies. However, existing diffusion-based RL methods primarily focus on offline setting for reward maximization, with limited consideration of safety in on…

Cited by 0SourceScholar
2022

On the Impossibility of Learning to Cooperate with Adaptive Partner Strategies in Repeated Games

ICML 2022spotlight

Learning to cooperate with other agents is challenging when those agents also possess the ability to adapt to our own behavior. Practical and theoretical approaches to learning in cooperative settings typically assume that other agents’ behaviors are stationary, or else make very specific assumption…

Cited by 5SourcePDFScholar
2021

Strategically efficient exploration in competitive multi-agent reinforcement learning

UAI 2021poster

High sample complexity remains a barrier to the application of reinforcement learning (RL), particularly in multi-agent systems. A large body of work has demonstrated that exploration mechanisms based on the principle of optimism under uncertainty can significantly improve the sample efficiency of R…

2017

Interactive Learning from Policy-Dependent Human Feedback

ICML 2017poster

This paper investigates the problem of interactively learning behaviors communicated by a human teacher using positive and negative feedback. Much previous work on this problem has made the assumption that people provide feedback for decisions that is dependent on the behavior they are teaching and…

Cited by 387SourcePDFScholar