Seminars and special events

• Webpage of the weekly seminar "Géométrie Algébrique" at the Laboratoire Paul Painlevé (Lille).

• Some past events I (co)organized:

  • Summer School Geometry of Instantons and Quivers in Lille, June 22–26, 2026.

  • Workshop Horospherical Varieties in Poitiers, June 8–10, 2026.

  • Workshop MathCpourL in Lille, May 18–22, 2026.

  • Workshop Algebraic Statistics in Lille, March 12–13, 2026.

  • Spring School Group Actions and Symplectic Singularities in Lille, June 2–6, 2025.

  • Workshop Group Schemes Actions in Low Dimension in Lille, May 14–16, 2025.

Research papers

• Classification of equivariantly normal curves via Altmann-Hausen-Süss theory (avec Gary Martínez-Núnez) — Preprint, arXiv:2607.06494 (2026).
• Horospherical subgroups in positive characteristic (avec Matilde Maccan) — Canadian Mathematical Bulletin. Published online, 1–21 (2026). doi:10.4153/S0008439526102288.
• Equivariant automorphism group and real forms of complexity-one varieties (avec Giancarlo Lucchini Arteche) — Preprint, arXiv:2507.18475 (2025).
• Real forms of Mori fiber spaces with many symmetries (avec Susanna Zimmermann) — Annali della Scuola Normale Superiore di Pisa - Classe di Scienze 49. doi:10.2422/2036-2145.202405_021.
• Real structures on complex algebraic varieties with a reductive group action — To appear in Proceedings of the Nottingham Online Algebraic Geometry Seminar, arXiv:2203.01232 (2022).
• Real structures on nilpotent orbit closures (avec Michael Bulois et Lucy Moser-Jauslin) — J. Lie Theory 32(3), 821–838 (2022).
• Forms of almost homogeneous varieties over perfect fields (avec Lucy Moser-Jauslin) — Ann. Henri Lebesgue 7, 357–407 (2024).
• Connected algebraic groups acting on three-dimensional Mori fibrations (avec Jérémy Blanc et Andrea Fanelli) — Int. Math. Res. Not. 2023, No. 2, 1572–1689 (2023).
• Real structures on symmetric spaces (avec Lucy Moser-Jauslin) — Proc. Am. Math. Soc. 149(8), 3159–3172 (2021).
• Real structures on horospherical varieties (avec Lucy Moser-Jauslin, appendice par Mikhail Borovoi) — Mich. Math. J. 71(2), 283–320 (2022).
• Automorphisms of P¹-bundles over rational surfaces (avec Jérémy Blanc et Andrea Fanelli) — Épijournal de Géom. Algébr. EPIGA 6, Paper No. 23, 47 p. (2022).
• Horospherical stacks (avec Ariyan Javanpeykar et Kevin Langlois) — Münster J. Math. 12(1), 1–29 (2019).
• Towards a symplectic version of the Chevalley restriction theorem (avec Michael Bulois, Christian Lehn, Manfred Lehn) — Compos. Math. 153(3), 647–666 (2017).
• The Cox ring of a complexity-one horospherical variety (avec Kevin Langlois) — Arch. Math. 108(1), 17–27 (2017).
• Stability conditions and related filtrations for (G,h)-constellations (avec Alfonso Zamora) — Int. J. Math. 28(14), Article ID 1750098, 34 p. (2017).
• On the geometry of normal horospherical G-varieties of complexity one (avec Kevin Langlois) — J. Lie Theory 26(1), 49–78 (2016).
• Invariant deformation theory of affine schemes with reductive group action (avec Christian Lehn) — J. Pure Appl. Algebra 219(9), 4168–4202 (2015).
• Moduli spaces of (G,h)-constellations (avec Tanja Becker) — Transformation Groups 20(2), 335–366 (2015).
• Invariant Hilbert schemes and desingularizations of symplectic reductions for classical groups — Math. Z. 277(1–2), 339–359 (2014).
• Invariant Hilbert schemes and desingularizations of quotients by classical groups — Transformation Groups 19(1), 247–281 (2014).
• Proceedings : Invariant Hilbert schemes and resolutions of categorical quotients — Oberwolfach Rep. 10(1), Report No. 17/2013, 1001–1004 (2013).

Course notes

• Algebraic subgroups of the Cremona group of rank 3

  Mini-course of 5h given for the Summer school "Cremona group" (Grenoble, 9th-27th June, 2025).

• An overview of the classification of spherical and complexity-one varieties

  Mini-course of 3h given for the workshop "Arc schemes and algebraic group actions" (Paris, 2nd-4th December, 2019).
  
  

Teaching / Enseignements

• J'étais en charge d'un CM d'algèbre linéaire et bilinéaire (en L3 maths) entre 2019 et 2022.

  Le polycopié de mon cours est disponible ici.
  
  

Miscellaneous

• HDR thesis (10/2021) Study of certain families of algebraic varieties endowed with an algebraic group action

• PhD thesis (11/2012) Schémas de Hilbert invariants et théorie classique des invariants

  
  

Some useful links

• arXiv
• HAL
• Zentralblatt MATH
• MathSciNet
• MathOverflow
• The Stacks Project
• Macaulay2
• LiE
• Upcoming conferences in algebraic geometry
• RT Géométrie Algébrique et Singularités (RT GAS)
• RT ALGÈBRE
• Detexify
• Text Compare!
• CultureMath
• Images des mathématiques
• Scientia Egregia (YouTube)