Personal Homepage of Quentin Ehret

Post-doc in Mathematics

I am a post-doctoral researcher in mathematics at New York University Abu Dhabi under the supervision of Pr. Sofiane Bouarroudj.

Before that, I was a PhD student in mathematics of the Université de Haute-Alsace under the supervision of Pr. Abdenacer Makhlouf.

Address: Division of Science and Mathematics, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates (here).

E-mail: qe209[at]nyu[dot]edu

CV (September 2025).

My page on ResearchGate.

My ORCID number is 0009-0004-2629-4518.

I speak French (mother tongue), English (professional and colloquial) and German (intermediate). I also have (very) basic notions of Arabic.

News

November 2025: the preprint The Superization of Hochschild's Lemma and Restricted Lie-Rinehart Superalgebras with S. Bouarroudj, A. Makhlouf and N. Shyntas is on arXiv (link).

September 2025: the paper Left-symmetric superalgebras and Lagrangian extensions of Lie superalgebras in characteristic 2 with S. Benayadi and S. Bouarroudj (arXiv) has been accepted for publication in Journal of Pure and Applied Algebra (0.1016/j.jpaa.2025.108086).

July 2025: the paper An alternative approach to deformations of restricted Lie-Rinehart algebras (arXiv) has been accepted for publication in Communications in Algebra. (10.1080/00927872.2025.2527218)

April 2025: the new preprint Jacobson identities for post-Lie algebras in positive characteristic with N. Gilliers is on arXiv (link).

April 2025: the new preprint Cohomology of restricted Poisson algebras in characteristic 2 with S. Bouarroudj and J. Liu is on arXiv (link).

April 2025: I have finally uploaded the new version of the map of the French Math departments and institutes.

Scientific interests

My scientific interests lie mainly in the domain of non-associative algebras, with a focus on restricted Lie algebras and Lie superalgebras over fields of positive characteristic.

During my post-doc, we are interested in the following topics:

  • Restricted cohomology of restricted Lie superalgebras;
  • Classification problem of restricted nilpotent Lie superalgebras of small dimension;
  • Double extensions of Lie superalgebras in various settings;
  • Connections on Lie superalgebras in characteristic 2 and Lagrangian extensions;
  • Restricted Poisson and Lie-Rinehart algebras in characteristic 2;
  • Representation theory of simple Lie superalgebras in characteristic 2;
  • Post-Lie algebras in positive characteristic;
  • Restricted Lie-Rinehart superalgebras in positive characteristics.

During my thesis (manuscript in French), I was interested in the following topics:

  • Deformation theory of Lie-Rinehart superalgebras over characteristic zero fields;
  • Computer-aided classification of Lie-Rinehart superalgebras over the complex field;
  • Restricted cohomology of restricted Lie algebras over positive characteristic fields;
  • Restricted formal deformations of restricted Lie-Rinehart algebras over positive characteristic fields;
  • Representations of restricted Lie-Rinehart algebras;
  • Double extensions of quasi-Frobenius restricted Lie superalgebras.