Andrzej Zuk (Université Paris 7)
Chebyshev Lab Colloquium
Thursday 5 April 17:15 room 14 (14-th line V.I., 29)
We present a construction which associates to the KdV equation the lamplighter group. It uses the L2 Betti numbers introduced by Atiyah which are homotopy invariants of closed manifolds.