The CRM-CNRS welcomes six scientists from France
Starting from September 1st, 2025, the IRL CRM-CNRS will host six scientists for long-term stays.
Nicolas CRAMPÉ
Researcher, CNRS
01/09/2025 – 31/12/2025
After studying at the École supérieure de physique et de chimie industrielles de la Ville de Paris (ESPCI Paris), Nicolas Crampé completed a PhD at the Annecy Laboratory of Theoretical Physics (LAPTh) at the University of Savoie. Recruited by CNRS in 2009, he worked at the University of Montpellier and, since 2018, at the University of Tours.
Specializing in exactly solvable systems and representation theory, Nicolas Crampé uses algebraic tools to explore the underlying symmetries of various physical problems. His research focuses on the calculation of entanglement entropies in quantum mechanics, the evaluation of average values in out-of-equilibrium statistical models, and the spectral analysis of Hamiltonians. More recently, he has also been interested in certain special functions and their role in the study of algebraic representations, association schemes, and integrable quantum models.
Lucile DEVIN
Lecturer, Université du Littoral Côte d’Opale
01/09/2025 – 31/08/2026
Lucile Devin is a lecturer at the University of Littoral Côte d’Opale (Calais). Specializing in analytic number theory, she completed her PhD in 2017 under the supervision of Florent Jouve at the Orsay Mathematics Laboratory. She then continued her career with several postdoctoral contracts that marked the beginning of numerous collaborations: Daniel Fiorilli at the University of Ottawa, Chantal David at the Centre de Recherches Mathématiques in Montreal, and Anders Södregren at Chalmers University, Gothenburg.
Her work mainly focuses on two specific subfields of analytic number theory. A Chebyshev observation seems to show a bias in the distribution of prime numbers in congruence classes; Lucile Devin has been interested in an axiomatization and generalizations of such biases. Some hypotheses to explain this phenomenon require a better understanding of the zeros of the associated L-functions. Her second area of study is precisely to prove certain instances of the Katz-Sarnak universality conjecture and Sarnak-Shin-Templier regarding the vertical distribution of the zeros of families of L-functions.
Claire GUERRIER
Researcher, CNRS
01/09/2025 – 31/08/2026
Claire Guerrier completed her PhD in mathematical modeling for neuroscience in 2011. After a postdoctoral position at UBC, where she worked between the mathematics department and the Brain Research Center, she has been a CNRS researcher at the Jean-Alexandre Dieudonné Laboratory (CNRS & Université Côte d’Azur) since 2019. Her expertise lies in solving multi-scale problems, mixing stochastic and continuous parts, asymptotic analysis, and the theory of mean first passage time. She has led several interdisciplinary projects with experimental laboratories – on the pre-Bötzinger complex with the Paris-Saclay Neuroscience Institute (CNRS & Université Paris-Saclay), on neuronal integration with the Faculty of Medicine at the University of British Columbia (UBC), and on myelin adaptation with the MBP consortium (McGill University), as well as a recent project on fungal growth with the Interdisciplinary Laboratory of Tomorrow’s Energies (Université Paris Cité).
Sébastien LABBÉ
Researcher, CNRS
01/09/2025 – 14/07/2026
Sébastien Labbé has been a CNRS researcher at the Bordeaux Laboratory of Computer Research at the University of Bordeaux since January 2017 after postdoctoral positions at Paris-Diderot University (Paris 7) and the University of Liège (Belgium). Sébastien Labbé obtained his PhD in 2012 in mathematics and computer science at the University of Quebec in Montreal under the supervision of Srecko Brlek. He spent the second year of his thesis, which was co-supervised between France and Quebec, at the University of Montpellier under the co-direction of Valérie Berthé.
Sébastien Labbé is interested in combinatorics, discrete geometry, symbolic dynamics, and number theory. His research explores the interactions between these fields, contributing to a better understanding of dynamical systems and geometric structures. His most recent results focus on aperiodic tilings of Jeandel-Rao, which he describes using substitutions as well as cut and projection schemes in dimension 4. He is also interested in numeration systems, continued fractions and their generalizations in higher dimensions, and open problems such as the Markoff injectivity conjecture. He has been involved in the development of the open-source mathematics software SageMath since 2008, which he uses daily in his research. During his stay at the CRM in 2025-2026, he aims to develop new collaborations with colleagues from LaCIM in the field of algebraic combinatorics.
Marc-Hubert NICOLE
Professor, Université de Caen
01/09/2025 – 31/08/2026
Since 2021, he has been actively involved in the development of the p-adic Kudla program in arithmetic geometry, notably by organizing events that encourage the participation of young scientists already working on either the classical Kudla program or p-adic methods: the XXXth Arithmetic Meetings in Caen in May 2022, the Cetraro conference on “Arithmetic theta series and p-adic modular forms” in June 2024, and the Luminy conference on “p-adic aspects of the Kudla program” in June 2026.
During a previous stay in Montreal in 2020-2021 (with the support of the IRL CRM-CNRS), he co-organized at the CRM, with Henri Darmon (McGill) and many other participants, during the thematic (pandemic) trimester of fall 2020, an in-person seminar around the beginnings of said program. During the winter of 2021, he co-funded the postdoctoral internship of Jackson Morrow (now “assistant professor” in Texas) at the CRM and organized with him and Giovanni Rosso (Concordia) a working group on non-archimedean variants of o-minimal geometry.
Emmanuel ROYER
University Professor, Université Clermont-Auvergne
01/09/2025 – 31/08/2026
Emmanuel Royer is a university professor at the University of Clermont-Auvergne, where he directed the mathematics laboratory (Blaise Pascal mathematics laboratory) from 2014 to 2018. He then became the deputy scientific director of the National Institute of Mathematical Sciences and their Interactions at CNRS from 2018 to 2023, in charge of support units (including CIRM in Marseille, IHP in Paris, and Mathdoc which promotes open publication), mediation and links with education, parity, and communication.
Since completing a thesis prepared under the supervision of Étienne Fouvry and Philippe Michel and defended in 2001, he has worked in number theory, particularly focusing on modular forms and related functions. Recently, for example, he studied the distribution of partial sums of Kloosterman sums from an analytical perspective; and, from a more algebraic viewpoint, the formal deformations of quasi-modular forms and Jacobi generalizing the Rankin-Cohen brackets.