arXiv Machine Learning

Hyperbolic Inverse Reinforcement Learning

Hyperbolic Inverse Reinforcement Learning (Hyperbolic IRL) introduces a reward function that depends on the Hyperbolic distance between feature vectors and a learned parameter vector, offering an alternative to traditional linear or neural network approaches. The method matches state‑of‑the‑art performance on standard benchmarks, performs especially well with limited data and in dense environments, and uncovers complex, non‑separable reward structures in human navigation tasks. Hyperbolic IRL thus enhances both predictive accuracy and interpretability of inferred reward functions.

arXiv Machine Learning
Jul 8

Supervised Reward Inference

arXiv:2502. 18447v2 Announce Type: replace Abstract: Existing approaches to reward inference typically assume that humans provide demonstrations according to specific behavior models.

By Will Schwarzer, Jordan Schneider, Philip S. Thomas, Scott Niekum
arXiv AI
Jul 8

Learning The Minimum Action Distance

arXiv:2506. 09276v4 Announce Type: replace-cross Abstract: This paper presents a state representation framework for Markov decision processes (MDPs) that can be learned solely from state trajectories, requiring neither reward signals nor the actions executed by the agent.

By Lorenzo Steccanella, Joshua B. Evans, \"Ozg\"ur \c{S}im\c{s}ek, Anders Jonsson
arXiv AI
2d ago

Hindsight Relabeling is All You Need for Reach-Avoid Learning

The paper introduces RADT, a decision transformer for offline, reward‑free, goal‑conditioned reinforcement learning that can handle arbitrary avoid‑regions specified at evaluation time. By encoding goals and avoid‑regions as prompt tokens and using an avoid‑region hindsight relabeling strategy, RADT learns reach‑avoid behavior from suboptimal random trajectories without reward or cost supervision. Across 17 tasks and environments, RADT outperforms existing offline goal‑conditioned RL models, achieving significant zero‑shot generalization to novel avoid‑region sizes and counts, and is also applied to a biological cell reprogramming task.

By Kevin Li, Marinka Zitnik