Tuesdays, 10:30am, in room 623.
Organizers: G. Arzhantseva,  P. de la Harpe, N. Monod, T. Smirnova-Nagnibeda.

Thursdays, 13:00pm, in room 624.
Organizers: G. Arzhantseva, P.-A. Cherix, N. Monod, T. Smirnova-Nagnibeda.

Fridays, 13:30pm, in room 616.
Organizers: G. Arzhantseva.