Seminar Algebra & Geometry

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 11-12 (Mon-Tue)  Dijon-Basel 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 Gromov-hyperbol<wbr style="font-family: Helvetica; font-size: 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)

 EPFL-Basel Meeting in Birational Geometry (in EPFL)


Oct 24


Oct 31


Nov 7


Nov 14


Nov 21  

Nov 28

 BASEL-EPFL 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.


Departement Mathematik und Informatik
Spiegelgasse 1
CH-4051 Basel

Contact for Seminar

For questions please contact

Jérémy Blanc

Information for the speakers can be found here.