Loïs Faisant

Since October 2025, I am a postdoc researcher at KU Leuven, Algebra Section, mentored by Raf Cluckers.

Before that, I was an IST-BRIDGE & Marie Skłodowska-Curie fellow in Tim Browning’s group, ISTA.

I completed my PhD in Summer 2023, under the supervision of Emmanuel Peyre at Institut Fourier, Université Grenoble Alpes.

I graduated from École polytechnique in 2020 (X2016).

Picture by Matilde Maccan.

mathematical interests

I work in arithmetic geometry. I am interested in a certain number of topics:

• algebraic geometry: Cox rings and applications (distribution of rational points on varieties, moduli spaces of curves, …); G-bundles over a curve;
• analytic number theory: circle method, harmonic analysis, zeta functions, especially the developpement of their motivic versions and their applications to geometry and arithmetics;
• logic: model theory for motivic integration and applications to arithmetics.

See the “Research” page for a list of works.

contact

my-first-name dot my-last-name at kuleuven.be

In my native language (French), my first name is gender neutral. Its pronouciation is close to that of Louis in English but is different: in ˈluːɪs you have to replace uː by əʊ (like the final o in tomato) to get ˈləʊɪs (and pronounce the final s if you did not). My pronouns in English are he/him/his/they/them/their. You can write to me in English, French, Spanish or Italian.

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some upcoming events

• Workshop ANR AdAnAr, CMLS, École polytechnique, France, 18-22 May, 2026
• 6th International Workshop on Zeta Functions in Algebra and Geometry, University of Galway, Ireland, 8–12 June 2026.