Stochastic analysis and applications

Group leader: Andrea Agazzi

Stochastic analysis deals with the study of systems evolving in time under the influence of randomness. We employ techniques from probability theory and statistical physics to analyze complex dynamical phenomena arising in diverse scientific fields. Our research is primarily concerned with systems of interacting particles, focusing on how simple, microscopic interactions translate into complex, macroscopic behaviors. We apply advanced stochastic analysis techniques to rigorously understand scaling limits and structural properties of such systems.

Specific areas of active research include:

  • Mathematical foundations of machine learning algorithms, particularly deep neural networks.
  • Stochastic dynamics of chemical reaction networks, with applications to system biology.
  • Mean-field games applied to traffic flow management.
  • Stochastic models in fluid dynamics.

Our group maintains active research collaborations with Federico Pasqualotto (UCSD), Jonathan Mattingly (Duke University), and the Probability Group at the University of Pisa.

Selected publications

  1. Bruno, Giuseppe, Federico Pasqualotto, and Andrea Agazzi (2025). Emergence of meta-stable clustering in mean-field transformer models. International Conference on Learning Representations. [link]
  2. Agazzi, Andrea, and Jianfeng Lu (2021). Global optimality of softmax policy gradient with single hidden layer neural networks in the mean-field regime. International Conference on Learning Representations. [link]
  3. Agazzi, Andrea, Amir Dembo, and Jean-Pierre Eckmann (2021). Large deviations theory for Markov jump models of chemical reaction networks. The Annals of Applied Probability 28(3), 1821-1855. [link]
  4. Agazzi, Andrea, Jonathan C. Mattingly, and Omar Melikechi (2023). Random splitting of fluid models: unique ergodicity and convergence. Communications in Mathematical Physics 401(1), 497-549 [link]

Group members