The CRM-CNRS welcomes nine scientists from France
Starting September 1, 2024, the CRM-CNRS IRL will host nine scientists for long-term stays.
Nicolas BOUSQUET
Researcher, CNRS
09/01/2024 – 08/31/2025
After earning a PhD in fundamental computer science in 2013 at LIRMM in Montpellier, Nicolas Bousquet joined CNRS in 2016 as a researcher, first at the G-SCOP laboratory in Grenoble and since 2020 at the LIRIS laboratory in Lyon.
The core of his research focuses on structural theory and graph algorithms. But his interests extend beyond these topics: game theory, combinatorics… In recent years, he has focused on reconfiguration problems, which aim to determine conditions that guarantee the existence of transformations between problem solutions. He also works on distributed algorithms and local certification.
This year he is hosted at LACIM (Laboratoire d’Algèbre, de Combinatoire et d’Informatique Mathématique) at UQAM, where he explores links between combinatorics and reconfiguration.
Michèle COUDERETTE
Associate Professor, Université Paris-Est Créteil
09/01/2024 – 08/31/2025
After a PhD supervised by Amade-Escot, Dorier, and Leutenegger and defended in 2018, titled “Comparative inquiry into the implementation of a didactic engineering for teaching subtraction in the first years of primary school in several didactic systems: case studies in Switzerland and France,” Michèle Couderette has been an associate professor of mathematics education at Université Paris-Est Créteil since 2019. Her research, within the LDAR (André Revuz Didactics Laboratory), is closely tied to teacher training and focuses on analyzing ordinary teaching practices: accounting for transpositive phenomena at work when implementing teaching situations and determining how knowledge is co-constructed by students and teachers.
Since 2019, her work has focused more specifically on teaching algorithmics in primary and secondary education, in particular the interactions between algorithmics and mathematics in programming tasks that embed mathematical knowledge.
During her stay at CRM-CNRS in Montréal, she aims to give her research a comparative dimension: comparing didactic systems of countries with different cultures and teaching traditions highlights the generic and specific aspects of teaching/learning practices and reveals what determines teachers’ actions from institutional and personal perspectives.
Sophie DABO-NIANG
Professor, Université de Lille
09/01/2024 – 02/28/2025
Sophie Dabo-Niang has been a professor of applied mathematics at Université de Lille since 2010 and a researcher at INRIA Lille. She earned her PhD in statistics from Université de la Sorbonne in 2002. After serving as a teaching and research assistant at Paris 2, she became an associate professor at Université Lille 3 in 2004. Her research focuses on the representation of time and space in random environments, inspired by real-world problems in biology, economics, epidemiology, physics, and environmental studies.
She has authored more than 80 scientific papers and 2 books, and has supervised 16 doctoral theses. She led the Quantitative Methods team of the LEM CNRS 9221 laboratory (2015-2019) and the EQUIPPE laboratory at Université Lille 3 (2010-2015). She currently heads the mathematics team at the Oncolille Institute. Committed to promoting mathematics and women’s inclusion, she chaired the EMS Committee for Developing Countries and was recently elected to the CIMPA (International Center of Pure and Applied Mathematics) Governing Board. She is also a member of the International Mathematical Union (IMU) diversity committee.
Sébastien DARSES
Associate Professor, Aix-Marseille Université
09/01/2024 – 08/31/2025
Thierry Daudé is an associate professor of mathematics since 2010, first at Université de Cergy-Pontoise, then at Université de Franche-Comté since 2022. His research mainly concerns inverse geometric problems arising from general relativity or medical imaging. For example, he studies the anisotropic Calderón problem, which asks whether one can determine (or even reconstruct) a metric inside a compact Riemannian manifold with boundary from measurements taken only on the boundary. These measurements are encoded by the Dirichlet-to-Neumann operator. With colleagues F. Nicoleau (Nantes) and N. Kamran (Montréal), he has obtained counterexamples to uniqueness in the local Calderón problem for manifolds with only Hölder regularity. In general relativity, he is currently working to determine the geometry of black hole-type spacetimes from the knowledge of their quasinormal modes (resonances), motivated by the fact that these resonance frequencies can now be computed using the LIGO and VIRGO gravitational wave detectors.
Thierry DAUDÉ
Associate Professor, Université de Franche-Comté
09/01/2024 – 08/31/2025
Thierry Daudé has been an associate professor of mathematics since 2010, first at Université de Cergy-Pontoise, then at Université de Franche-Comté since 2022. His research mainly focuses on inverse geometric problems arising from general relativity or medical imaging. For example, he studies the anisotropic Calderón problem, which asks whether one can determine (or reconstruct) a metric inside a compact Riemannian manifold with boundary from measurements taken only on the boundary. These measurements are encoded by the Dirichlet-to-Neumann operator. With colleagues F. Nicoleau (Nantes) and N. Kamran (Montréal), he has obtained counterexamples to uniqueness in the local Calderón problem for manifolds with only Hölder regularity. In general relativity, he is currently working to determine the geometry of black hole-type spacetimes from the knowledge of their quasinormal modes (resonances), motivated by the fact that these resonance frequencies can now be computed using the LIGO and VIRGO gravitational wave detectors.
Ewen GALLIC
Associate Professor, Aix-Marseille Université
09/01/2024 – 08/31/2025
Ewen Gallic is an associate professor in economics at Aix-Marseille Université and a member of Aix-Marseille School of Economics (UMR CNRS 7316) since September 2018. He holds a PhD in economics from Université de Rennes. His research covers two main areas: data science and environmental economics. The data science side explores topics such as calibration of probabilistic classifiers, causal inference, and algorithmic discrimination, with applications in health economics and actuarial science. The environmental economics side focuses on the effects of climate change, particularly examining and quantifying the impacts of weather shocks on the economy. Since September 2023, he has been a visiting researcher at Université du Québec à Montréal, and since September 2024, he has been on CNRS delegation at the Centre de Recherches Mathématiques – CNRS.
Denis GREBENKOV
Research Director, CNRS
09/01/2024 – 12/31/2024
Denis Grebenkov is a CNRS research director at the Institute of Physics. After earning his PhD in 2004 at École Polytechnique, he has focused on diffusive phenomena and their applications. The central question of his work is to understand the link between the geometric structure of a complex system and its transport properties. This theme spans several subjects in different disciplines. On the mathematical side, it involves the spectral properties of the Laplace operator, the Steklov problem, and even non-Hermitian operators, the description of stochastic processes confined by irregular interfaces, asymptotic analysis, optimization, and inverse spectral problems. On the applied side, it involves intracellular transport, diffusion-controlled chemical reactions, first-passage statistics, and more. These studies combine theoretical and numerical tools, as well as collaborations with experimentalists.
Denis Grebenkov is the author of 185 publications and has received several distinctions: the École Polytechnique thesis prize in 2004, the Giulio Cesare Borgia prize in 2010, the CNRS bronze medal in 2012, and the Friedrich Wilhelm Bessel prize in 2019. He is a recipient of a Simons Chair in autumn 2024 to pursue work on the Steklov problem in collaboration with Canadian mathematicians.
Claire GUERRIER
Researcher, CNRS
09/01/2024 – 08/31/2025
Claire Guerrier earned her PhD in mathematical modeling for neuroscience in 2011. After a postdoc 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 includes solving multi-scale problems combining stochastic and continuous components, asymptotic analysis, and mean first-passage time theory. She has carried out several interdisciplinary projects with experimental labs: on the pre-Bötzinger complex with the Paris-Saclay Institute of Neuroscience (CNRS & Université Paris-Saclay), on neuronal integration with the UBC Faculty of Medicine, on myelin adaptation with the MBP consortium (McGill University), and a recent project on fungal growth with the Interdisciplinary Laboratory of Tomorrow’s Energy (Université Paris Cité).
Emmanuel ROYER
Professor, Université Clermont-Auvergne
09/01/2024 – 08/31/2025
Emmanuel Royer is a professor at Université Clermont-Auvergne, where he directed the mathematics laboratory (Laboratoire de mathématiques Blaise Pascal) from 2014 to 2018. He then served as deputy scientific director of the CNRS National Institute for Mathematical Sciences (Insmi) from 2018 to 2023, in charge of support units (including CIRM in Marseille, IHP in Paris, and Mathdoc for open publication), outreach and education links, gender equality, and communication.
Since a PhD supervised by Étienne Fouvry and Philippe Michel and defended in 2001, he has worked in number theory, focusing in particular on modular forms and related functions. Recently he studied the distribution of partial sums of Kloosterman sums from an analytic perspective and, from a more algebraic viewpoint, the formal deformations of quasi-modular and Jacobi forms generalizing Rankin-Cohen brackets.
Antoine ZUREK
Associate Professor, Université de Technologie de Compiègne
09/01/2024 – 02/28/2025
After a PhD in applied mathematics supervised by Benoît Merlet and Claire Chainais-Hillairet and defended in Lille in September 2019, Antoine Zurek completed a two-year postdoc in Vienna, Austria, in Ansgar Jüngel’s team. Since September 2021 he has been an associate professor at Université de Technologie de Compiègne (UTC) and a member of the LMAC (Applied Mathematics Laboratory of Compiègne). He specializes in numerical and theoretical analysis of partial differential equations (PDEs). More precisely, his work focuses on constructing and analyzing numerical methods that preserve the structure of certain parabolic and hyperbolic PDEs. He also studies the use of computer-assisted proof methods for certain PDE systems. Finally, Antoine Zurek has obtained a six-month CNRS delegation (09/01/2024–02/28/2025) at the CNRS CRM IRL in Montréal.