Institut de Mathématiques de Marseille, UMR 7373




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Flexibility of projective representations

Lundi 22 mai 14:00-15:00 - Sang-Hyun KIM - Université de Séoul

Flexibility of projective representations

Résumé : For which countable group G, does the moduli space X(G) = Out(G) \ Hom(G,PSL(2,R)) / Inn(PSL(2,R)) contain (uncountably many distinct equivalence classes of) indiscrete faithful representations ? Groups with such properties are called flexible. We prove combination theorems for flexible groups, and show that most Fuchsian groups and all limit groups (possibly with torsion) are flexible. The abundance of ``minimal’’ quasi-morphisms on those groups will follow. Joint with Thomas Koberda and Mahan Mj.

JPEG - 6.5 ko
Sang-Hyun KIM

Lieu : CMI, salle de séminaire R164 - I2M - Château-Gombert
39 rue Frédéric Joliot-Curie
13453 Marseille cedex 13

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Pour en savoir plus sur cet événement, consultez l'article Séminaire Géométrie, Dynamique et Topologie (GDT)