Lectures
In the slides below, the hand-written slides were polished up by Isabelle Mordant.
November 22nd, 2018: Taquin bloc à changer, École Normale Supérieure (Paris), Seminar "Maths pour tous", available on YouTube, slides (in French; I am grateful to the organizers Vadim Lebovici and Lucas Willems for their advice during the preparation of this lecture).
April 14th, 2021: Fibrés de Hodge et hauteurs de Griffiths, Institut de Mathématiques d’Orsay, Seminar of PhD students of the EDMH.
June 1st, 2021: Hauteurs de Griffiths-Kato des hypersurfaces, Institut de Mathématiques d’Orsay, PhD students day of the Séminaire d’Arithmétique et Géométrie Algébrique.
August 30th, 2023: Discriminant de polynômes homogènes à plusieurs variables : géométrie et arithmétique, Welcome days for the Master's program of the Fondation Mathématique Jacques Hadamard, Institut de Mathématiques d'Orsay, slides (in French).
October 4th, 2023: Pinceaux d’hypersurfaces projectives et hauteurs de Griffiths-Kato, École Polytechnique, Geometry seminar of the Centre de Mathématiques Laurent Schwartz.
April 22nd and 29th, 2024: Bons espaces de modules d’après Alper : définitions et premiers résultats, Institut de Mathématiques d’Orsay, Learning seminar on algebraic stacks and good moduli spaces.
May 15th, 2024: Théorie géométrique des invariants et hypersurfaces projectives singulières, Séminaire du RéGA (Seminar for algebraic geometry students), Institut Henri Poincaré, slides (in French).
June 11th, 2024: Griffiths heights of pencils of hypersurfaces and geometric invariant theory, Chalmers University, Arithmetic geometry days Gothenburg Freixit, slides .
November 19th and 26th and December 3rd, 2024: Modules with integrable connections on analytic and algebraic complex varieties: Regular connections and regular singular points in dimension 1, Institut de Mathématiques d’Orsay, Learning seminar on D-modules.
February 12th, 2025: Géométrie, algèbre, arithmétique : jadis et naguère, joint lecture with Jean-Benoît Bost, as part of the Paris-Saclay Summit 2025.
This lecture was recorded and is available on YouTube (in French).
Here is a version of the slides (in French) of this lecture, to which some references have been appended.
September 23rd, 2025: Semi-stabilité des hypersurfaces projectives singulières, Institut de Mathématiques d'Orsay, Welcome day of the Séminaire d’Arithmétique et Géométrie Algébrique, slides (in French).

Contact
Laboratoire de mathématiques d'Orsay
Bât. 307, bureau 3S22
Université Paris-Saclay
91405 Orsay
thomas.mordant@universite-paris-saclay.fr