Current

The seminar is held on Tuesdays from 11 to 12 and is organised by Razvan Barbulescu and Wessel van Woerden. Unless otherwise stated it takes place in room 2 of IMB. To get announcements, you can subscribe to the mailing list of the Bordeaux number theory seminars. Last minute changes may appear first on the IMB website.

• 2024-04-16
  11:00
  Salle 2
  Fabrice Étienne (CANARI)
  Computing Class Groups With an Inductive Algorithm
  In this talk, first, I will present a method by Biasse, Fieker, Hofman and Page to compute the class group of some number fields inductively. This method uses the properties of norm relations, which are some relations in R[G] where R is a commutative ring and G a finite group. Then, I will discuss about how we can generalise the notion of norm relations and use this new kind of relations to obtain a similar method for computing class groups, that is more effective than the previous one.
• 2024-04-30
  11:00
  Salle 2
  Lars Ran (Radboud University)
  TBA
• 2024-05-07
  11:00
  Salle 2
  Felix Huber (LaBRI)
  TBA
• 2024-05-14
  11:00
  Salle 2
  Oana Padurariu (Max-Planck-Institut für Mathematik, Bonn)
  Bielliptic Shimura curves X_0^D(N) with nontrivial level
  In this talk, I explain how we work towards completely classifying all bielliptic Shimura curves X_0^D(N) with nontrivial level N, extending a result of Rotger that provided such a classification for level 1. This allows us to determine the list of all pairs (D,N) for which X_0^D(N) has infinitely many degree 2 points, up to three explicit possible exceptions. This is joint work with Frederick Saia.