Cari tutti,

vi segnalo questa attività per il ciclo di seminari dei Baby Geometri:

Lunedì 30 Aprile alle 16:30

presso l'Aula Seminari del Dipartimento di Matematica

Alessio Savini(ETH Zurich - Bologna)

ci parlerà di:

Rigidity of real hyperbolic lattices: a "natural" approach di cui riporto l'abstract:

Rigidity of lattices in semisimple Lie groups has been widely studied so far. One of the most celebrated theorem is Mostow rigidity, which states the following. Assume n bigger or equal than 3. If two complete hyperbolic n-manifolds of finite volume have isomorphic fundamental groups then they are isometric. Equivalently their fundamental groups are conjugated in the group of isometries of the hyperbolic n-space. There are several ways to prove this theorem. We will expose a proof based on the so-called natural maps, introduced by Besson-Courtois-Gallot and will try to explain the role played by the geometric/aritmetic mean inequality in the proof.

Tutti gli interessati sono invitati a partecipare.

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Saluti,

Giulio Belletti, Edoardo Fossati e Marco Moraschini