Welcome!
I am Davide, a PhD candidate at the Laboratoire d’Informatique de Grenoble within the GHOST (former POLARIS) group, under the supervision of Panayotis Mertikopoulos and Bary Pradelski.
My research lies at the intersection of game theory and online learning, with a focus on the geometric structure of competitive interactions and the design of no-regret learning dynamics for adversarial environments.
I expect to defend my PhD in September 2026, and will then be on the academic job market.
Contact me at davide dot legacci at univ-grenoble-alpes dot fr
Publications Code
News
2026
- March 2026: ⭐ Prize for the best poster at the Journées SMAI-MODE 2026!
- 1-3 April 2026 : presenting at Statlearn 2026 in Grenoble : Adapting to Conflict: Equilibrium Structure and Adaptive Learning in Harmonic Games
- 18-20 March 2026 : presenting at Journées SMAI-MODE 2026, Nice (France) – A Geometric Decomposition of Continuous Games: Convergence vs. Recurrence under Regularized Learning
- Winter term 2025 – 2026, teaching assistant for the course Probabilités et simulation, PolyTech INFO4, Grenoble
2025
- October 2025: awarded top reviewer at NeurIPS 2025 ⭐
- October 2025: presenting my work on Geometric Decomposition of Continuous Games at 30 Years of Game Theory at Institut Henri Poincaré (I’m always the ones with the eyes closed in the photos)
- July 2025: Attending Nash 75 @Oxford
- June 2025: best poster award ⭐ at the Games and Artificial Intelligence Multidisciplinary Summer School 2025 ACM Europe School
- May 2025: The impact of uncertainty on regularized learning in games was accepted at ICML 2025
- LIVE FROM PEPR IA days in Saclay – 18 March 2025: two of our papers spotlighted by the leads!
- March 2025: our paper on Characterizing the Convergence of Game Dynamics via Potentialness was accepted for publication at Transactions on Machine Learning Research!
2024
- December 2024, visiting Vancouver to present our spotlight poster at NeurIPS2024
- October 2024, presentation on Learning in Games with Conflicting Interests at cjc-ma2024, Lyon. [SLIDES]
- September 2024, our paper No-regret Learning in Harmonic Games: Extrapolation in the Face of Conflicting Interests was accepted at NeurIPS 2024 as spotlight ⭐!
- September 2024, abstract accepted at the Congrès des Jeunes Chercheur.es en Mathématiques Appliquées, Lyon.
- Winter term 2024 – 2025, teaching assistant for the course Probabilités et simulation, PolyTech INFO4, Grenoble
- July 2024, presenting our spotlight poster at the International Conference on Machine Learning 2024, Vienna
- July 2024, presentation at the Workshop on Learning in Games, Toulouse on Regularized Learning in Harmonic Games. [SLIDES]
- June 2024, presentation at the Games and Artificial Intelligence Multidisciplinary Summer School 2024, Metz on Regularized Learning in Harmonic Games.
- June 2024: A geometric decomposition of finite games: Convergence vs. recurrence under exponential weights, was accepted ICML24 as spotlight, in top 3.5% of all submissions ⭐
- June 2024, POLARIS seminar. Talk: Learning in Games with Conflicting Interests. [SLIDES]
- May 2024, second place 🥈 at the LIG PhD Madness day contest – Your Thesis in 180 seconds
2023
- September 2023, presentation at SLMath: Recurrence vs Convergence – A Geometric Approach to Learning in Games. [SLIDES]
- August – September 2023, visiting period at SLMath, University of California, Berkeley for the Mathematics and Computer Science of Market and Mechanism Design workshop.
- June 2023, presentation at the Alpine Game Theory Symposium. [SLIDES]
- February 2023, POLARIS seminar. Talk: Hodge Decomposition for Normal Form Games. [SLIDES]
- November 2022: Begin PhD at Laboratoire d’Informatique de Grenoble
Before that
- Feb – Aug 2022: venturing outside academia, working for a few months as Digital Content Specialist for Mathematics at StudySmarter
- Fall 2020 – Spring 2022: Research assistant at STRUCTURES Cluster of Excellence with Gabriele Benedetti, Heidelberg University
- June 2021, Symplectic Geometry Seminar. Talk: A dichotomy for the generalized Hamiltonian Lotka-Volterra system
- March 2021, RTG 2229 Seminar on Holomorphic dynamics à la Milnor. Talk: Leau-Fatou Flower Theorem
- December 2020, Symplectic Geometry Seminar. Talk: From Normal Form Games to Hamiltonian Evolutionary Dynamics
- November 2020, STRUCTURES Jour Fixe. Talk: Zero-sum evolutionary games and convex Hamiltonian systems. [SLIDES]
- October 2020, RTG 2229 Seminar on Topological K-Theory
- September 2020, Symplectic Geometry Seminar. Talk: The Poisson Geometry of Replicator Dynamics. [SLIDES]
- Summer term 2020, teaching assistant for the seminar “Geometric Quantization at Heidelberg University
- Summer term 2020, teaching assistant for the lecture “Differential Geometry 1” at Heidelberg University
- Winter term 2020-2021, seminar on “Mathematical Aspects of Classical Mechanics“
- May 2020, Master of Science, Heidelberg University: Poisson geometry in Evolutionary Game Theory
- Summer term 2018, teaching assistant for the lecture “General Relativity” at Heidelberg University