Publications

Game Theory, Online Decision Making and Multi-Agent Learning

(2026) Efficient Swap Regret Minimization in Combinatorial Bandits
A. Kontogiannis^*, V. Pollatos^*, P. Mertikopoulos and I. Panageas.
AISTATS 2026 [paper]

(2025) Efficient Kernelized Learning in Polyhedral Games Beyond Full-Information: From Colonel Blotto to Congestion Games
A. Kontogiannis^*, V. Pollatos^*, G. Farina, P. Mertikopoulos and I. Panageas.
NeurIPS 2025 [paper]

(2025) Enhancing Cooperative Multi-Agent Reinforcement Learning with State Modelling and Adversarial Exploration
A. Kontogiannis^*, K. Papathanasiou^*, Y. Shen, G. Stamou, M. Zavlanos and G. Vouros.
ICML 2025 [paper] [code]

(2025) An Extended Benchmarking of Multi-Agent Reinforcement Learning Algorithms in Complex Fully Cooperative Tasks
G. Papadopoulos^*, A. Kontogiannis^*, F. Papadopoulou, C. Poulianou, I. Koumentis and G. Vouros.
AAMAS 2025 [paper] [code]

Optimization and Computational Complexity

(2024) The Computational Complexity of Finding Second-Order Stationary Points
A. Kontogiannis^*, V. Pollatos^*, S. Kanellopoulos, P. Mertikopoulos, A. Pagourtzis and I. Panageas.
ICML 2024 [paper]