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math.OC2026
Hidden Convexity in Queueing Models
Xin Chen, Linwei Xin, Minda Zhao
We study the joint control of arrival and service rates in queueing systems with the objective of minimizing long-run expected cost minus revenue. Although the objective function i…
math.OC2026
Landscape of Policy Optimization for Finite Horizon MDPs with General State and Action
Xin Chen, Yifan Hu, Minda Zhao
Policy gradient methods are widely used in reinforcement learning. Yet, the nonconvexity of policy optimization poses significant challenges in understanding the global convergence…