Current

The seminar is held on Tuesdays from 11 to 12 and is organised by Sabrina Kunzweiler and Maxime Bombar. Unless stated otherwise 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.

• 2025-03-25
  11:00
  Salle 2
  Jean Kieffer (CNRS and CARAMBA)
  Fast evaluation of Riemann theta functions in any dimension
  The Riemann theta functions are multivariate complex-analytic functions with deep links to the theory of abelian varieties over the complex numbers. For applications in algorithmic number theory, one would like to efficiently evaluate them at a given point (a period matrix) to very large precision with certified error bounds. In this talk, I will present a new evaluation algorithm for theta functions in uniform quasi-linear time in the required precision, in any fixed dimension (joint work with Noam D. Elkies). I will also discuss its implementation in the FLINT number theory library.
• 2025-04-15
  11:00
  Salle 2
  Axel Lemoine (INRIA Paris)
  The Tangent Space Attack