AI Research

AI & ML Research Papers

A comprehensive index of artificial intelligence and machine-learning research with AI-generated summaries, citation metrics, and direct links to papers and code.

All Papers

2 papers

PreprintBulletin of the American Mathematical Society2009

Topology and data

Gunnar Carlsson

This paper introduces topological data analysis (TDA) as a framework for extracting qualitative, large-scale structure from high-dimensional, noisy point clouds using geometry and topology.

2.7kJan 29, 2009

Preprint2026

Beyond Euclidean Clipping: Overcoming Exploration Collapse in LLM RL via Riemannian Isometric Policy Optimization

Zhicheng Cai, Xinyuan Guo, Hanlin Wu, et al.

Reveals PPO-Clip's Euclidean geometry flaw causing exploration collapse in LLM RL and proposes Riemannian Isometric Policy Optimization (RIPO) for balanced exploration.

0Jul 11, 2026Reinforcement LearningReasoning

arXiv