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math.OC2026
The Increasing Gap Dynamics in a General Spatial Matching Model
Andrés Fielbaum, Roberto Cominetti, José Correa
We study a representation of a problem that appears in numerous transport systems: servers distributed over a given space (e.g., cars on an urban network), receive random reque…
math.OC2026
Minimax-optimal Halpern iterations for Lipschitz maps
Mario Bravo, Roberto Cominetti, Jongmin Lee
This paper investigates the minimax-optimality of Halpern fixed-point iterations for Lipschitz maps in general normed spaces. Starting from an a priori bound on the orbit of iterat…
math.OC2025
Near-Optimal Sample Complexity for MDPs via Anchoring
Jongmin Lee, Mario Bravo, Roberto Cominetti
We study a new model-free algorithm to compute -optimal policies for average reward Markov decision processes, in the weakly communicating case. Given a generative mod…