2026_02_27

Two new preprints out!

• Optimal scaling laws in hierarchical multi-index models, a joint work with Leonardo Defilippis (ENS), Florent Krzakala (EPFL), and Bruno Loureiro (ENS).
• Topological Exploration of High-Dimensional Empirical Risk Landscapes: general approach, and applications to phase retrieval: we numerically explore the optimization landscape of generalized linear models (in particular phase retrieval) using the Kac-Rice formula. Joint work with Tony Bonnaire (U. Paris-Saclay) and Giulio Biroli (ENS).