Our weekly Seminar "Algebra and Geometry" takes place on
Tuesdays from 10:30 to 12:00 a.m., Mathematical Institute (Spiegelgasse 1, ground floor) with tea and coffee at 10:10 a.m. (on the 6th floor of Spiegelgasse 1).
Sep 1112 (MonTue)  DijonBasel Meeting in Algebraic Geometry (in Dijon) 
Sep 19  Anne Lonjou (Basel)  Cremona group and hyperbolic spaces The Cremona group is the group of birational transformations of the projective plane. It acts on a hyperbolic space which is an infinite dimensional version of the hyperboloid model of H^n. This action is the main recent tool to study the Cremona group. After defining it, we will study its Voronoï tesselation, and describe some graphs naturally associated with this construction. Finally we will discuss which of these graphs are Gromovhyperbol<wbr style="fontfamily: Helvetica; fontsize: 12px; " />ic. 
Sep 26 

Sep 28 (Thursday)  Verteidigung von Christian Urech 
Oct 3  Yves de Cornulier (Lyon 1) 
Oct 10  Frederic Han (Paris 7)  On birational transformations of P3 of low degree. After a short introduction to birational transformations of a projective space, we will focus on the case of P3. Few is known about birational transformations of P3 and the case of degree 3 is already difficult. To explain how things differ in larger degree it is natural to look at transformations of bidegree (4,4). In this talk we detail families of examples in degree 3 and bidegree (4,4) to illustrate this opposition. (joint work with J. Déserti) 
Oct 17  Konstantin Shramov (HSE Moscow) 
Oct 20 (Friday)  EPFLBasel Meeting in Birational Geometry (in EPFL) 
Oct 24 

Oct 31 

Nov 7 

Nov 14 

Nov 21  
Nov 28  BASELEPFL Meeting in Birational Geometry (in Basel) Egor Yasinsky (Moscow) Giulo Codogni (EPFL) +... 
Dec 5  
Dec 12  
Dec 19 

Information about former semesters can be found here.