collaborators

5 papers

math.OC2026

Robust Bayesian Portfolio Optimization with Discrepancy-based Posterior Ambiguity

Zongxia Liang, Yang Liu, Xingjian Ma

We study a continuous-time robust Bayesian portfolio optimization problem under drift uncertainty of risky assets. The investor learns unknown asset drifts through Bayesian filteri…

stat.ML2026

Beyond Bellman: High-Order Generator Regression for Continuous-Time Policy Evaluation

Yaowei Zheng, Richong Zhang, Shenxi Wu +5

We study finite-horizon continuous-time policy evaluation from discrete closed-loop trajectories under time-inhomogeneous dynamics. The target value surface solves a backward parab…

cs.LG2026

Hyperparameter Transfer Laws for Non-Recurrent Multi-Path Neural Networks

Shenxi Wu, Haosong Zhang, Xingjian Ma +4

Deeper modern architectures are costly to train, making hyperparameter transfer preferable to expensive repeated tuning. Maximal Update Parametrization (P) helps explain why man…

cs.CL2025

ATLAS: A High-Difficulty, Multidisciplinary Benchmark for Frontier Scientific Reasoning

Hongwei Liu, Junnan Liu, Shudong Liu +33

The rapid advancement of Large Language Models (LLMs) has led to performance saturation on many established benchmarks, questioning their ability to distinguish frontier models. Co…

math.OC2025

Robust Utility Maximization with Intractable Claims under Distributional Ambiguity: A Random Distributionally Robust Optimization Approach

Guohui Guan, Zongxia Liang, Xingjian Ma

This paper studies a robust utility maximization problem for intractable claims under distributional ambiguity, where the distribution of the claim cannot be inferred from market i…