collaborators

9 papers

math.OC2026

Online Optimization of Difference-of-Convex Compositions with Smooth Mappings

Jingwei Ji, Jong-Shi Pang, Renyuan Xu

We study online optimization for a broad class of structured non-convex non-smooth problems where each loss is a composition of a difference-of-convex function with a smooth mappin…

cs.LG2026

Weak-to-Strong Learning in Decision Making

Jingwei Ji, Renyuan Xu

Many operational decisions rely on predictive models that estimate uncertain outcomes conditional on observable contexts. Training such models, however, often faces a fundamental d…

cs.LG2026

Adaptive Partitioning and Learning for Stochastic Control of Diffusion Processes

Hanqing Jin, Renyuan Xu, Yanzhao Yang

We study reinforcement learning for controlled diffusion processes with unbounded continuous state spaces, bounded continuous actions, and polynomially growing rewards: settings th…

cs.AI2026

Conditional Diffusion Guidance under Hard Constraint: A Stochastic Analysis Approach

Zhengyi Guo, Wenpin Tang, Renyuan Xu

We study conditional generation in diffusion models under hard constraints, where generated samples must satisfy prescribed events with probability one. Such constraints arise natu…

cs.LG2026

One-Step Generative Modeling via Wasserstein Gradient Flows

Jiaqi Han, Puheng Li, Qiushan Guo +3

Diffusion models and flow-based methods have shown impressive generative capability, especially for images, but their sampling is expensive because it requires many iterative updat…

cs.LG2026

Neural Network-Based Score Estimation in Diffusion Models: Optimization and Generalization

Yinbin Han, Meisam Razaviyayn, Renyuan Xu

Diffusion models have become a leading paradigm in generative AI, with score estimation via denoising score matching as a central component. While recent theory provides strong sta…