Research Talks

Invited seminars, keynotes, conference presentations, and the seminars I hosted. Talks for schools, companies, professional bodies, and the general public are under Public Engagement.

Invited talks & seminars

• 2026
  Discussant for the presentation of the edited volume Algomedia (2026) by P. Conte and A. C. Dalmasso, research seminar cycle "Prismi – Sei parole chiave per un'ecologia dell'intelligenza artificiale", University of Bergamo, 7 May 2026.
• 2026
  "Spectral Learning on Directed Graphs and Hypergraphs via More Expressive Laplacian Matrices", ISE Seminar Series, invited by Prof. T. Ralphs, Lehigh University, Department of Industrial and Systems Engineering, Bethlehem, PA, USA, 20 January 2026.
• 2025
  "Advances in Spectral Graph and Hypergraph Learning: towards more expressive Laplacian matrices", invited by Prof. S. Gualandi, Università di Pavia, Pavia, Italy.
• 2025
  "Graph and Hypergraph Learning via Complex- and Quaternion-Valued Spectral Convolutional Operators", keynote, 3rd Workshop of UMI Group Mathematics for AI and Machine Learning (MATH4AI), Bari, Italy.
• 2023
  "Integer programming and norm minimization (in machine learning?)", invited by Prof. P. Avella, Università del Sannio, Benevento, Italy.
• 2023
  "Bound-optimal cutting-plane generation", invited by G. Eichfelder, J. Kronqvist, A. Lodi, F. Oliveira, E. Rönnberg, Learning from Both Sides: Linear and Nonlinear Mixed-Integer Optimization, Institut Mittag-Leffler, Djursholm, Sweden.
• 2023
  "A Numerically-Exact Algorithm for the Bin Packing Problem", invited by Prof. L. Mariani, Università di Milano-Bicocca, Milan, Italy.
• 2022
  "Minimizing vector norms with integer programming", invited by Prof. S. Gualandi, Università di Pavia, Pavia (virtual).
• 2021
  "Integer programming and norm minimization for data science", invited by Prof. E. Messina, Università di Milano-Bicocca, Milan (virtual).
• 2019
  "Bilevel programming and the computation of pessimistic single-leader-multi-follower equilibria in Stackelberg games", invited by Dr. S. Toubaline, LAMSADE, Université Paris-Dauphine, Paris, France.
• 2019
  "The bin packing problem with item class setups", invited by Prof. E. Amaldi, Politecnico di Milano, Milan, Italy.
• 2019
  "Bilevel programming and the computation of pessimistic single-leader-multi-follower equilibria in Stackelberg games", invited by Dr. T. Oertel, Cardiff University, Department of Mathematics, Cardiff, UK.
• 2018
  "Computing Optimistic and Pessimistic Leader-Follower Equilibria with Multiple Followers", invited by Dr. R. Misener, Imperial College London, Department of Computing, London, UK.
• 2018
  "Network routing through the Internet as a Stackelberg game", invited by Prof. T. Ralphs, Lehigh University, Department of Industrial and Systems Engineering, Bethlehem, PA, USA.
• 2017
  "Exact single level and bilevel programming approaches to the computation of Leader-Follower Nash Equilibria in games with many followers", invited by Dr. L. Tran-Thanh, University of Southampton, AIC seminar series, Southampton, UK.
• 2017
  "Network routing through the Internet as a Stackelberg game", invited by Prof. H. Xu, CORMSIS Business Advisory Board meeting, University of Southampton, Southampton, UK.
• 2017
  "Exact single level and bilevel programming approaches to the computation of Leader-Follower Nash Equilibria in games with many followers", invited by Dr. S. Gualandi, Università di Pavia, Pavia, Italy.
• 2017
  "Network routing through the Internet as a Stackelberg game", invited by Prof. A. Koster, RWTH Aachen University, Aachen, Germany.
• 2016
  "Computing Leader-Follower Nash Equilibria in games with many followers via optimistic and pessimistic bilevel programming", invited by Prof. A. Koster, RWTH Aachen University, Aachen, Germany.
• 2016
  "On bilevel programming and the computation of Leader-Follower (Nash) Equilibria in games with many followers", invited by Prof. N. Gatti, Politecnico di Milano, Milan, Italy.
• 2015
  "(Bilevel programming and) bound-optimal cutting plane generation", invited by Prof. T. Ralphs, Lehigh University, Department of Industrial and Systems Engineering, Bethlehem, PA, USA.
• 2014
  "On the exact separation of rank inequalities for the maximum stable set problem", invited by Dr. F. D'Andreagiovanni, Zuse Institute Berlin (ZIB), Berlin, Germany.
• 2012
  "Coordinated cutting plane generation via multi-objective separation and extensions", invited by Prof. A. Koster, RWTH Aachen University, Aachen, Germany.
• 2011
  "Applications of exact mathematical programming", invited by Dr. M. Pozzi, Centro Elettronica Sperimentale Italiano (CESI), Milan, Italy.

Selected conference presentations

• 2026
  Poster "PANDA: Prior-guided Attentional Dual-path Architecture" (with R. Jain, F. Belotti, S. Fiorini), Learning on Graphs (LoG) Italian Meetup 2026, University of Pisa, Pisa, Italy, 9–11 June 2026.  ·  Meetup page
• 2026
  Poster presentations at the International Conference on Learning Representations (ICLR 2026), Rio de Janeiro, Brazil: "Solving the 2-norm k-hyperplane clustering problem via multi-norm formulations"; "Directional Sheaf Hypergraph Networks: Unifying Learning on Directed and Undirected Hypergraphs" (with E. Mule, S. Fiorini, A. Purificato, F. Siciliano, F. Silvestri); "Sheaves Reloaded: A Direction Awakening" (with S. Fiorini, H. Aktas, I. Duta, P. Morerio, A. Del Bue, P. Liò).
• 2025
  "Spatial branch-and-bound methods for solving the k-Hyperplane clustering" (with M. Jaidee), 22nd EUROPT Conference on Advances in Continuous Optimization (EUROPT 2025), Southampton, UK. Work subsequently published at ICLR 2026 as "Solving the 2-norm k-hyperplane clustering problem via multi-norm formulations".
• 2025
  "Graph and Hypergraph Learning via Complex- and Quaternion-Valued Spectral Convolutional Operators", Economics Winter Seminar 2025, Castione della Presolana, Italy.
• 2024
  "Graph Learning in 4D: a Quaternion-valued Laplacian to Enhance Spectral GCNs", AAAI Conference on Artificial Intelligence (AAAI 2024), Vancouver, Canada.
• 2023
  "Bound-optimal cutting-plane generation" (with T. Ralphs), Learning from Both Sides, Institut Mittag-Leffler, Djursholm, Sweden.
• 2023
  "Mixed integer bilevel programming methods for solving pessimistic multi-follower bilevel problems over simplices", 1st International Conference on Bilevel Optimization (ICBO2023), Southampton, UK.
• 2022
  "A Numerically-Exact Algorithm for the Bin Packing Problem" (with R. Baldacci, F. Cordeau, F. Furini), EURO 2022, Espoo, Finland.
• 2021
  "Decomposition methods for maximizing a submodular function combined with a set-union operator" (with F. Furini, I. Ljubic), 3rd IMA/OR Society Conference, online.
• 2020
  "Private Bayesian Persuasion with Sequential Games" (with N. Celli, N. Gatti), AAAI Conference on Artificial Intelligence (AAAI 2020), New York, USA.
• 2019
  "Computing Optimal Ex Ante Correlated Equilibria in Two-Player Sequential Games" (with A. Celli, N. Gatti), AAMAS 2019, Montreal, Canada.
• 2018
  "Leadership in Singleton Congestion Games" (with A. Marchesi, N. Gatti), IJCAI 2018, Stockholm, Sweden.
• 2018
  "Computing Pessimistic Leader-Follower Equilibria with Multiple Followers (in the mixed-pure case)", ISMP 2018, Bordeaux, France.
• 2017
  "Using Mathematical Optimisation and Game Theory to improve the speed of broadband connections over the Internet" (poster), STEM for Britain, House of Commons, London, UK.
• 2017
  "Pessimistic Leader-Follower Equilibria with Multiple Followers" (with N. Gatti, A. Marchesi), IJCAI 2017, Melbourne, Australia.
• 2015
  "On the generation of cutting planes which maximize the bound improvement" (with M. Tieves), SEA 2015, Paris, France.
• 2014
  "Coordinated cutting plane generation via multi-objective separation", INFORMS Annual Meeting 2014, San Francisco, CA, USA.
• 2012
  "Spatial branch-and-bound for nonconvex Euclidean norm constrained mathematical programs" (with F. Margot), ISMP 2012, Berlin, Germany.
• 2010
  "Improving cutting plane generation with 0-1 inequalities by bi-criteria separation" (with E. Amaldi, S. Gualandi), SEA 2010, Naples, Italy.

Seminars hosted at the University of Bergamo

• 2026
  Prof. G. P. Leonardi (University of Trento), Statistics and Computational Methods Seminar Series, Department of Economics, 14 October 2026 (upcoming).  ·  Event page
• 2025
  Prof. F. Furini (Sapienza University of Rome), "Hidden Bilevel Structures in Graph Disconnection Problems: Models and Exact Algorithms", Statistics and Computational Methods Seminar Series, Department of Economics, 17 December 2025.  ·  Event page
• 2025
  Prof. C. Bravo (Western University, Canada), "Financial Risk Contagion Models Using Dynamic Multimodal Graph Learning", Economics Seminar Series, Department of Economics, 20 June 2025.