arXiv Statistics ML

Constrained Gradient Equilibrium: Approachability under Locally Constrained Adversaries

arXiv Machine Learning
Jun 26

Blackwell Approachability and Gradient Equilibrium are Equivalent

arXiv:2606. 27315v1 Announce Type: new Abstract: Gradient equilibrium (GEQ) is a recently introduced online optimization framework that generalizes first-order stationarity from offline optimization and abstracts problems like online conformal prediction.

By Brian W. Lee, Nika Haghtalab, Michael I. Jordan, Ryan J. Tibshirani
arXiv AI
Sep 11

Safe Learning Under Irreversible Dynamics via Asking for Help

The paper presents an algorithm that lets a learning agent ask for help from a mentor and transfer knowledge between similar states, enabling safe and effective learning in Markov decision processes with irreversible dynamics and infinite state spaces. It proves that both regret and the number of mentor queries grow sublinearly over time, using a sequence of three reductions to achieve a general result. The work claims to be the first formal proof that an agent can achieve high reward while becoming self‑sufficient in an unknown, unbounded, high‑stakes environment without resets.

By Benjamin Plaut, Juan Li\'evano-Karim, Hanlin Zhu, Stuart Russell
arXiv Machine Learning
Oct 7

On the Computational Tractability of Robust Bandits

The paper studies robust bandits, a framework for learning when the true environment lies outside the learner’s hypothesis class. It presents a polynomial‑time algorithm achieving ≠O(√T) regret for a specific tractable case, while showing that slight extensions of this case are NP‑hard. The work highlights the computational limits of robust bandits and suggests their relevance to AI alignment.

By Vanessa Kosoy, Vinayak Pathak
arXiv Machine Learning
Aug 18

Online Convex Optimization with Dueling Feedback

arXiv:2608. 15050v1 Announce Type: new Abstract: We study online convex optimization with dueling (pairwise comparison) feedback, where the learner observes only a binary preference between two queried points.

By Yiyang Lu, Hareshkumar Jadav, Mohammad Pedramfar, Ranveer Singh, Vaneet Aggarwal