Stéphane Guillermou

Stéphane Guillermou is a French mathematician and CNRS researcher (directeur de recherche) at the Laboratoire de Mathématiques Jean Leray (UMR 6629, CNRS / Nantes Université). He earned his PhD in 1995 at Université Pierre-et-Marie-Curie (Paris VI) under Pierre Schapira. His work sits at the interface of the microlocal theory of sheaves and symplectic topology: sheaf quantization of Hamiltonian isotopies, non-displaceability of Lagrangians, and the symplectic geometry of cotangent bundles. He represented France at the International Mathematical Olympiad in 1988 and 1989, winning a bronze medal both years.

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• PhD 1995 under Pierre Schapira at Paris VI on 'Classes de Lefschetz des paires elliptiques'; Schapira is a founder of microlocal sheaf theory, so his lineage is direct - he now co-authors with Schapira and Kashiwara.1995
• Represented France at the IMO in 1988 (16 pts, rank 111, bronze) and 1989 (27 pts, rank 88, bronze), then built a research career in the exact area he now works in - microlocal sheaf theory.1989
• Co-authored a Duke Math. J. paper (2012) with Masaki Kashiwara and Pierre Schapira on sheaf quantization of Hamiltonian isotopies, a landmark in the microlocal/symplectic interface.
• Based at Laboratoire de Mathématiques Jean Leray, Nantes (CNRS UMR 6629); teaches Master 2 courses (homological algebra and sheaf theory) and co-organizes/lectures at summer schools.