Galois Covers and Deformations


Monday 25 June

  • 9:00-10:30 Andrew Obus/Stefan Wewers, Cyclic extensions and the local lifting problem, I.
  • 11:00 - 12:00 Jakob Stix, Arithmetic of fundamental groups, I.

  • 14:00 - 15:00 Akio Tamagawa, Variation of fundamental groups of curves in positive characteristic.

  • 15:15 - 16:15 Kirsten Wickelgren, Massey products in Galois cohomology via rational points.

  • 16:45 - 17:45 Lars Halvard Halle, The Néron component series of a degenerating family of abelian varieties.


  • 18:30 - 19:30 Jean-Philippe Guillo (professor at the Conservatoire de Bordeaux), Piano recital.


  • Tuesday 26 June

  • 9:30 - 10:30 Jakob Stix, Arithmetic of fundamental groups, II.
  • 11:00 - 12:00 Olivier Wittenberg, Abelian birational sections.


  • 14:00 - 15:00 Michael Temkin, Stable modification of relative curves.

  • 14:00 - 15:00 Andrew Obus, Stable (and good) reduction of three-point covers.

  • 16:45 - 17:45 Philippe Cassou-Noguès, Cohomological invariants of quadratic forms.


  • Wednesday 27 June

  • 9:00 - 10:00 Jakob Stix, Arithmetic of fundamental groups, III.

  • 10:15 - 11:15 Matthieu Romagny, Reduction of the group scheme of p-power roots of unity and its torsors, I.
  • 11:30 - 12:30 Frans Oort, CM Jacobians (and slides).


  • 13:30 - 18:00 Saint-Emilion excursion.


  • Thursday 28 June

  • 9:00-10:30 Andrew Obus/Stefan Wewers, Cyclic extensions and the local lifting problem, II.
  • 11:00 - 12:00 Matthieu Romagny, Reduction of the group scheme of p-power roots of unity and its torsors, II.

  • 14:00 - 15:00 Florian Pop, Minimalistic birational p-adic section conjecture for varieties.

  • 15:15 - 16:15 Yuichiro Hoshi, Conditional results on the birational section conjecture over small number fields.

  • 16:45 - 17:45 Robin de Jong, Local canonical heights for Galois covers of the projective line.


  • 19:30 - Conference diner.

  • Friday 29 June

  • 9:30 - 10:30 Matthieu Romagny, Reduction of the group scheme of p-power roots of unity and its torsors, III.
  • 11:00 - 12:00 Florian Pop, The Oort conjecture on lifting covers of curves.