HALF: Harmonic Analysis and Lean Formalization

ERC Synergy Grant.


HALF

Our goal is to tackle pivotal and long-standing open problems in harmonic analysis, and formalize their proofs in real-time at the University of Bonn.

This shows that it is feasible for mathematicians to verify the correctness of their own proofs.

Challenges in harmonic analysis:

  • Find estimates for multilinear singular integrals;
  • Find new estimates and convergence results for Ergodic averages;
  • Develop nonlinear analogue of Carleson’s theorem.

Our formalization will use Lean and Mathlib.

News

  • This project will start April 2026.

Team

Principal Investigators

Postdocs

PhD Students

Jobs

  • We are looking for PhD candidates to join our project! You can apply via the BIGS website (in April or November)
  • We are looking for student research assistants to join the Lean formalization effort. Contact Floris van Doorn if you are interested (only available for students in Bonn).