Author

Liner Xiang

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#artificial intelligence Preprint Sep 2026

OTROPE: Optimal Transport-based Robust Off-policy Evaluation for Large Language Models

The Optimal Transport-based Robust Off-Policy Evaluation (OTROPE) is proposed, a likelihood-free evaluation that performs distributional correction in a semantic space via optimal transport to align labeled behavior-policy samples with unlabeled target-policy samples, yielding a doubly robust-style evaluation.

Lin-Er Xiang, Wen-Bo Zhang, Heng-Rui Cai · 0 citations

#machine learning Preprint Aug 2026

Policy Optimization and Statistical Inference for Online Contextual Matrix Games

This work introduces online contextual matrix games and proposes OnGameLearn, an online learning algorithm that efficiently balances exploration and exploitation across both player actions and contexts and effectively navigates the intertwined challenges of strategic and contextual decision-making.

Lin-Er Xiang, Yixin Wang, Hengrui Cai · 0 citations