Working Papers
Thomas Schwarz, Ryann Sim, and Chun Kai Ling
Computing Equilibria in Games with Stochastic Action Sets.
Under review at NeurIPS 2026
[Arxiv]Chun Kai Ling, Thomas Schwarz, and Ryann Sim
Equilibrium Computation in Extensive-Form Games with Stochastic Action Sets.
Under review at SAGT 2026
Journal Publications
Wayne Lin, Georgios Piliouras, Ryann Sim, and Antonios Varvitsiotis.
Learning in Quantum Common‑Interest Games and the Separability Problem.
Quantum 9 (2025): 1689.
[Arxiv]Wayne Lin, Georgios Piliouras, Ryann Sim, and Antonios Varvitsiotis.
No‑Regret Learning and Equilibrium Computation in Quantum Games.
Quantum 8 (2024): 1569.
[Arxiv]
Conference Publications
Rui Zheng, Ryann Sim and Antonios Varvitsiotis
Solving Imperfect-Recall Games via Sum-of-Squares Optimization.
International Conference on Machine Learning, 2026.
[Arxiv]Vincent Leon, Iosif Sakos, Ryann Sim, and Antonios Varvitsiotis.
Certifying Concavity and Monotonicity in Games via Sum‑of‑Squares Hierarchies.
Advances in Neural Information Processing Systems, 38, 2025.
[Arxiv]John Lazarsfeld, Georgios Piliouras, Ryann Sim, and Stratis Skoulakis.
Optimism Without Regularization: Constant Regret in Zero‑Sum Games.
Advances in Neural Information Processing Systems, 38, 2025.
[Arxiv]John Lazarsfeld, Georgios Piliouras, Ryann Sim, and Andre Wibisono.
Fast and Furious Symmetric Learning in Zero‑Sum Games: Gradient Descent as Fictitious Play.
Conference on Learning Theory, 2025.
[Arxiv]Volkan Cevher, Georgios Piliouras, Ryann Sim, and Stratis Skoulakis.
Min‑Max Optimization Made Simple: Approximating the Proximal Point Method via Contraction Maps.
SIAM Symposium on Simplicity in Algorithms, 2023.
[Arxiv]Rahul Jain, Georgios Piliouras, and Ryann Sim.
Matrix Multiplicative Weights Updates in Quantum Zero‑Sum Games: Conservation Laws & Recurrence.
Advances in Neural Information Processing Systems, 35, 2022.
[Arxiv]Georgios Piliouras, Ryann Sim, and Stratis Skoulakis.
Beyond Time‑Average Convergence: Near‑Optimal Uncoupled Online Learning via Clairvoyant Multiplicative Weights Update.
Advances in Neural Information Processing Systems, 35, 2022.
[Arxiv]Ryann Sim, Stratis Skoulakis, Lillian J Ratliff, and Georgios Piliouras.
Fast Convergence of Optimistic Gradient Ascent in Network Zero‑Sum Extensive Form Games
International Symposium on Algorithmic Game Theory. Springer, 2022.
[Arxiv]Tanner Fiez, Ryann Sim, Stratis Skoulakis, Georgios Piliouras, and Lillian Ratliff.
Online Learning in Periodic Zero‑Sum Games.
Advances in Neural Information Processing Systems, 34, 2021.
[Arxiv]Stratis Skoulakis, Tanner Fiez, Ryann Sim, Georgios Piliouras, and Lillian Ratliff.
Evolutionary Game Theory Squared: Evolving Agents in Endogenously Evolving Zero‑Sum Games.
AAAI Conference on Artificial Intelligence, 2021.
[Arxiv]
Workshop Papers
- Rui Zheng, Ryann Sim and Antonios Varvitsiotis
Welfare Optimization over Semi‑Algebraic Equilibrium Sets.
OptLearnMAS-26 @ 25th International Conference on Autonomous Agents and Multiagent Systems (AAMAS), 2026.
