Rank gradient and the first ℓ²-Betti number of few-relator random groups

• 📅Tue 27 Oct 2026 · 13:00
• 📍MPI für Mathematik in den Naturwissenschaften, A3 01 (Sophus-Lie room) — All events
  Inselstraße 22, 04103 Leipzig, Germany

The first ℓ²-Betti number of the group provides a lower bound for its rank gradient, and no examples are known for which this inequality is strict. In this talk, I will present joint work with Miguel