Responsabilités administratives
France
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President, Commission des habilitations des universités parisiennes, 1995-1997.
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Membre suppléant, Commission des Spécialistes 25ème section, 1997-2001.
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Elected member, CNU (25ème section), 1999-2002.
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Project head, "Formes automorphes" within the Institut de Mathématiques de Jussieu, UMR 7586 du CNRS, January 2001-December 2007.
International
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Coordinator of the project “Automorphic Forms” of the European (TMR) Network “Arithmetic Geometry”, 1996-2000; coordinator of the node (Paris 7) of the network, 1998-2000.
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Coordinator (with G. Henniart) of the project “Automorphic Forms” of the European (RTN) Network “Arithmetic Algebraic Geometry”, 2000-2003.
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Member of the scientific committee, Institute of Mathematical Sciences at Zheijang
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University, Hangzhou, Chine, 2003.
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Co-organizer, biannual London-Paris Number Theory Seminar, 2006-2013.
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Member, advisory board, Courant Research Center Göttingen, "Higher order structures in Mathematics", 2007-2011.
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Member, Scientific Steering Committee, Isaac Newton Institute (Cambridge), 2013-2017.
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Member, Site Review Committee, Banff International Research Station, spring 2015.
Responsabilités scientifiques, organisation de colloques
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Co-organizer, weekly seminar “Groupes réductifs et formes automorphes,” Université Paris 7, 1996-2002.
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Member of the scientific committee, “Analyse, arithmétique et géométrie sur les groupes réductifs,” June 1996.
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Co-organizer, “La guerre des sciences n’aura pas lieu: autour de l’affaire Sokal,” HPMP, Institut Henri Poincaré, 9 juin 1997.
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Co-organizer of the special period on automorphic forms, l’Institut Henri Poincaré, spring 2000.
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Member of the scientific committee, Summer school “La conjecture de Birch et Swinnerton-Dyer,” Institut de Mathématiques de Jussieu, July 2002.
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Co-organizer of the conference “Représentations p-adiques/modulo p de groupes p-adiques” CIRM, Luminy, June 16-20 2003.
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Co-organizer of the conference “Formes automorphes et formules de trace, colloque en l’honneur du 60ème anniversaire de Jean-Pierre Labesse”, September 25-27 2003.
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Co-organizer of the conference " Conference on p-adic methods in modular forms", joint session Paris-New York, June 22 2006.
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Member of the scientific committee, "Recent developments in the arithmetic of Shimura varieties and Arakelov geometry", Centre de Recerca Matemática, Barcelona, July 10-15, 2006.
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Co-organizer, French-Asian summer school on algebraic geometry and number theory, afternoon session "formule des traces et formes automorphes" (July 21 2006).
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Co-organizer, MSRI Hot Topics workshop “Modularity for GL(2) and beyond,” fall 2006.
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Co-organizer, summer school on Serre’s Conjecture Luminy, July 2007.
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Co-organizer, summer school on p-adic representations of p-adic groups, Institut de Mathématiques de Jussieu, summer 2008.
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Co-organizer, “The stable trace formula, functoriality, and Galois representations”, Banff International Research Station, August 2008.
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Organizer, "Automorphic forms, Galois representations, and geometric representation theory", Córdoba, Argentina, August 2011.
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Member, scientific committee, summer school on the Gan-Gross-Prasad conjectures, Institut de Mathématiques de Jussieu, summer 2014.
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Co-organizer, semester program "New Geometric Methods in Number Theory and Automorphic Forms," MSRI, Fall 2014.
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Co-organizer, workshop on Geometric Methods in the mod p local Langlands Correspondance, CRM Ennio de Giorgi, Pisa, June 2016.
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Member, scientific committee, Journées Arithmétiques (Caen), July 2017.
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Co-organizer, workshop on Automorphic Motives, Euler Systems & p-adic L-functions, Nisyros, Greece, July 2017.
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Co-organizer, the infinity project, mathematical and transdisciplinary colloquium on infinity in parallel with the Foire Internationale de l'Art Contemporain, Paris, October 18-21, 2017.
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Member, scientific committee, thematic trimester on Algebraic groups and the geometrization of the Langlands program, ENS Lyon, April 23-June 29, 2018.
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Co-organizer, International Conference in celebration of the Paris school of automorphic forms, May 14-18, 2018.
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Co-organizer, conference in honor of Barry Mazur's 80th birthday, June 4-8, 2018.
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Member, organizing committee, conference in honor of the 60th birthday of Tom Hales, June 2018.
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Member, scientific committee, AGRA III (Aritmética, Grupos y Analisis), Córdoba, Argentina, July 2018.
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Member, scientific committee, summer school and conference, Arithmetic Geometry in Carthage (Tunisia), June 2019.
Comités de redaction
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Journal de l'Institut de Mathématiques de Jussieu : Member of the editorial committee, January 2000 — August 2011
Editor in chief, September 2006 — August 2011 -
Editorial boards: Astérisque, Mathematical Research Letters, Journal of the European Mathematical Society.
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Member, AMS History of Mathematics Editorial Committee, 2017-2021