Publications

Game Theory / Online Learning / 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]

Multi-Agent Deep Reinforcement Learning

(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]

(2023) Inherently Interpretable Deep Reinforcement Learning through Mimicking
A. Kontogiannis^* and G. Vouros.
EXTRAAMAS 2023 (AAMAS Workshop) [paper]

Applied AI/ML

(2021) Tree-based Focused Web Crawling with Reinforcement Learning
A. Kontogiannis^*, D. Kelesis, V. Pollatos, G. Paliouras and G. Giannakopoulos.
Submitted for publication (2024) [paper]

(2021) A Personalized Machine-Learning-Enabled Method for Efficient Research in Ethnopharmacology. The Case of the Southern Balkans and the Coastal Zone of Asia Minor.
E. Axiotis^*, A. Kontogiannis, E. Kalpoutzakis and G. Giannakopoulos.
Applied Sciences [paper]