- Genève, Complexes cubiques CAT(0) et hyperbolicité acylindrique, 31 octobre 2017.
- Montpellier, Complexes cubiques CAT(0) et hyperbolicité acylindrique, 6 octobre 2017.
- Newton Institute, Old results and new questions on the Rapid Decay Property, 12 mai 2017. Approximation, deformation, quasification.
- Newton Institute, Median spaces and spaces with thin triangles, 13 avril 2017. Program seminar.
- Southampton, Acylindrical hyperbolicity of groups acting on CAT(0) cube complexes, 27 avril 2017. Asymptotic decomposition methods in geometry, dynamics and operator algebras.
- Colloquium du LJAD, Ballade géométrique au pays des groupes discrets, 6 février 2017.
- MSRI, Median spaces in the Median seminar, September 13th and 20th, 2016.
- Singapore, IMS, Group actions on CAT(0) cube complexes, 17 août 2016.
- Wienna, The median class for groups acting on CAT(0) cube complexes, 28 juillet 2016.
- Genève, Complexes cubiques CAT(0) et cohomologie bornée, 3 mai 2016.
- Montevideo, Group actions on CAT(0) cube complexes, 22 avril 2016.
- Nice, Introduction aux complexes cubiques CAT(0), 1 mars 2016.
- Lyon, Complexes cubiques CAT(0) et actions de groupes, 18 novembre 2015.
- Orsay, Introduction to the Rapid Decay property, 18 juin 2015, Around Langlands correspondances.
- OSU, The median class for groups acting on CAT(0) cube complexes, 26 mai 2015.
- Berkeley, The median class for groups acting on CAT(0) cube complexes, 6 mai 2015.
- Lac de Come, Introduction aux complexes cubiques CAT(0), 24 septembre 2014.
- Rennes, The median class for groups acting on CAT(0) cube complexes, 17 juin 2014. Geometric, dynamical and combinatorial aspects of infinite groups.
- Pisa, The median class for groups acting on CAT(0) cube complexes, 30 mai 2014.
- Strasbourg, Complexes cubiques CAT(0) et actions de groupes, colloquium 16 mai 2014.
- ENS Paris, Groupes, géométrie et analyse, séminaire Des Mathématiques, 30 avril 2014.
- Luminy, Introduction to amenability, 13 janvier 2014.
- ISI Delhi, Actions on CAT(0)cube complexes, 13 novembre 2013.
- JNU Delhi, Bounded cohomology and subgroup distortion, 8 octobre 2013.
- INSA Delhi, Glass ceiling in France for math professor promotions, 24 septembre 2013, during the Summit for Women in Sciences.
- IISER Pune, Groups, geometry and analysis, Indian women in mathematics, 26 juillet 2013.
- Villetanneuse, Complexes cubiques CAT(0) et la classe de cohomologie bornée médiane, 30 mai 2013.
- Orsay, La classe médiane pour les groupes agissant sur un complexe cubique CAT(0), 24 mai 2013.
- New York Women in math and computer sciences, Geometric group theory, gender (in)balance and affirmative action in Switzerland, US, France and India 10 mai 2014.
- IISER Mohali, Groups, geometry and analysis, 23 avril 2013.
- Vivekananda University, Calcutta, The median class for groups acting on CAT(0) cube complexes. 22 mars 2014.
- University of Delhi, Groups, geometry and analysis, 19 mars 2013.
- Université de Metz, Groupes agissant non-trivialement sur des complexes cubiques CAT(0), 20 décembre 2012.
- University of Michigan, The median class for groups acting on CAT(0) cube complexes, 6 décembre 2012.
- Cornell University, The median class for groups acting on CAT(0) cube complexes, 3 décembre 2012.
- Université de Glasgow, The median class for groups acting on CAT(0) cube complexes, 31 octobre 2012.
- Oxford, Central extensions and bounded cohomology, 18 février 2012.
- Bonn, Central extensions and bounded cohomology, 22 décembre 2011, Geometric group theory day.
- ENS Lyon, Distortion et cohomologie bornée Groupe de travail, 30 septembre 2011.
- Neuchatel, Groupes, géométrie et analyse, colloquium, 27 septembre 2011.
- LSU, Central extenstions and bounded cohomology, in the follow-up workshop, 10 juillet 2011.
- OSU, Random walks, in my conference, June 3rd 2011.
- Clermont Ferrand, Groupes et géométrie, Séminaire du labo, 7 mars 2011.
- New Orleans, Distortion and bounded cohomology, AMS meeting, January 7th, 2011.
- Grenoble, Cohomologie bornée des groupes de Lie, séminaire de topologie, 2 décembre 2010.
- Montreal, Introduction to median spaces, Group actions and dynamics conference at CRM, October 6th 2010.
- Indianapolis, Distorted centers and bounded cohomology, Wabash analysis conference, October 3rd 2010.
- Bangalore, Median spaces and property (T), ICM satellite conference, August 2010.
- Vogtmann Fest in Luminy, On a finitely presented lazy group, June 2010.
- Cornell Topology Festival, Distorted centers and bounded cohomology, May 2010.
- OSU Topology seminar, Distorted centers and bounded cohomology, January 2010.
- JNU, conferences on Advances in Mathematics, Groups, Geometry and Analysis, New Delhi, October 1st, 2009.
- Orléans, séminaire du MAPMO, Groupes et géométrie, September 24th, 2009.
- Université de Rennes, Espaces Médians et propriété (T), September 21st, 2009.
- IHES, Pansu 50th birthday, On Nori's question, September 2009.
- Ascona, conference on Affine actions, Cohomology and distortion for central subgroups in Lie groups, June 2009.
- Strasbourg, Geometric group theory conference, Distorted centers and bounded cohomology, June 9, 2009.
- Oberwohlfach, Manifolds perspectives, Distorted centers and bounded cohomology, May 2009
- Université de Vannes, Espaces médians, March 13, 2009.
- CUNY Graduate center, A caracterization of hyperbolicity, March 3, 2009.
- Université de Versailles, La propriété de décroissance rapide pour les groupes semisimples p-adiques, February 10, 2009.
- Caen, rencontres trans-Couenon, New examples of finitely presented groups with strong fixed point properties, December 2008.
- OSU, New examples of finitely presented groups with strong fixed point properties, November 2008.
- TIFR Bombay, Median spaces, August 2008.
- OSU, (Relatively) hyperbolic groups, Examples of groups, June 2008.
- Puerto Rico, Median spaces and property (T), Workshop on Analysis on groups, March 17, 2008.
- CUNY Graduate center, Median spaces, February 15, 2008.
- Orsay, La propriété de décroissance rapide, December 2007.
- MSRI, Median spaces Topics in geometric group theory conference, November 7, 2007.
- Marseille, Espaces médians et propriété (T), September 28, 2007.
- MSRI, Gromov's theorem on polynomial growth groups, Classics of Geometric Group Theory, August 24, 2007.
- Bedlewo, Summer school on non-positive curvature, Median spaces, June 29, 2007.
- Université de Caen, Espaces médians, June 13, 2007.
- Penn State University, Median spaces and Property (T), April 13, 2007.
- The Ohio-State University, Median spaces, March 28, 2007.
- EPFL, Phylogenetic tree-space as a median space, March 13, 2007.
- EPFL, Embedding median spaces in L1-spaces, March 12, 2007.
- The Ohio-State University, Median spaces and Property (T), February 22, 2007.
- Columbia University, Median spaces, February 16, 2007.
- Orsay, A characterization of hyperbolicity, February 2, 2007.
- Université de Lille, A characterization of hyeprbolicity, February 1, 2007.
- EPFL, conference on affine actions, Median spaces and Property (T), January 22, 2007.
- University of Geneva, Median spaces and Property (T), December 19, 2006.
- ETHZ, Traces and groups C*-algebras, December 18, 2006.
- Neuchatel University, A characterization of hyperbolicity, Groups and Geometry day, November 27, 2006.
- ETHZ, A characterization of hyperbolicity, November 1, 2006.
- The Ohio-State University, A characterization of hyperbolicity, October 18, 2006.
- Louisiana State University, A characterization of hyperbolicity, October 13, 2006.
- Cornell University, A characterization of hyperbolicity, September 22, 2006.
- The Ohio-State University, Gromov hyperbolic groups, Invitation to research, May 8, 2006.
- Univerity of Pennsylvania, Group ring conjectures, Colloquium April 5, 2006.
- CMI Marseille, Propriété DR et distorsion de sous-groupes, March 6, 2006.
- University of Chicago, Property RD, March 2, 2006.
- Palo Alto, AIM workshop on property RD, January 23-27, 2006.
- Southampton, A characterization of hyperbolicity, LMS series, December 16th, 2005.
- Imperial College London, The property of Rapid Decay on locally compact groups, LMS series, December 15th, 2005.
- Glasgow, Homotopy idempotents on closed manifolds and the Geoghegan conjecture, LMS series, December 12, 2005.
- Michigan Ann Arbor, A characterization of hyperbolicity, November 18, 2005.
- The Ohio-State University, Introduction to relatively hyperbolic groups, October 5, 2005
- Workshop on the Baum-Connes conjecture, University of Neuchatel, Group rings, completions and conjectures, September 8, 2005.
- TIFR Mumbai, The property of Rapid Decay on locally compact groups, August 22, 2005.
- HRI Allahabad, Homotopy idempotents on closed manifolds and the Geoghegan conjecture, July 29, 2005.
- Wasach Topology Conference, Homotopy idempotents on closed manifolds, June 2, 2005.
- IAS Princeton, The Geometry of Groups, 4 undergraduate lectures, May 2005.
- CUNY Graduate Center, The property of Rapid Decay on locally compact groups, March 8, 2005.
- Yale University, The property of Rapid Decay for lattices in rank one Lie groups, February 28, 2005.
- Columbia University, Groups acting on wall-spaces, February 25, 2005.
- University of Utah, The property of Rapid Decay, February 1, 2005.
- University of Utah, On the Geoghegan conjecture, February 1, 2005.
- University of Illinois at Urbana-Champaign, The property of Rapid Decay, January 26, 2005.
- Workshop on K-theory and the geometry of groups, University of Hawaii, Property RD and groups acting on CAT(0) cube complexes, January 20, 2005.

- The Ohio-State University, The property of Rapid Decay, January 11, 2005.

- CMS Winter 2004 meeting in Montréal, Discrete groups, operator norms and distortion, December 13, 2004.

- University of Minnesota, Group ring conjectures, December 7, 2004.

- G3 conference, Destin Florida, Toward a generalization of hyperbolic spaces II, November 12, 2004.

- Cornell University, A characterization of hyperbolic spaces, November 9, 2004.

- Texas A&M, Some groups acting on CAT(0) cube complexes, October 13, 2004.

- Albany 2004, A characterization of hyperbolic spaces and R-trees, parallel session, October 9, 2004.

- Binghamton University, On the Geoghegan conjecture, September 9, 2004.

- Albany CBMS conference, Toward a generalization of hyperbolic spaces, August 18, 2004.

- Université de Neuchâtel, Normes d'opérateurs et groupes de Lie, June 29, 2004.

- Cortona, Random walks conference Property RD on locally compact groups, parallel session , June 14, 2004.

- Wabash analysis conference Indiana, Property RD on locally compact groups, April 3, 2004.

- IUPUI, Indianapolis, Group ring conjectures, April 2, 2004.

- Cornell University, Group ring conjectures, April 1, 2004 in the Oliver Club.

- Caltech, Pasadena, Rapid decay and relatively hyperbolic groups , March 26, 2004.

- McMaster University Hamilton, On Euler Characteristics for groups, March 8, 2004.

- Cornell University, Some groups acting on CAT(0) cube complexes, February 17, 2004.

- CUNY Graduate Center, Some groups acting on CAT(0) cube complexes, February 6, 2004.

- CMI Marseille, La propriété DR pour les réseaux en rang 1, January 5, 2004.

- Joint India-AMS meeting, Bangalore, Some groups acting on L-delta-spaces, December, 2003.

- Paris Jussieu, La propriété DR pour certains groupes relativement hyperboliques, Decembre 4, 2003.

- Université de Neuchâtel, La propriété DR pour certains groupes relativement hyperboliques, December 2, 2003.

- ETH Zürich, The Rapid Decay property for all rank one lattices, December 1, 2003, Algebra-Topology seminar.

- Paris Orsay, Construction d'un complexe cubique CAT(0) à partir d'un espace a murs, November 18, 2003.

- Munster, New examples of groups with the Rapid Decay property, November 6, 2003.

- Brandeis University, From wall spaces to CAT(0) cube complexes, October 21, 2003.

- Cornell University, From wall spaces to CAT(0) cube complexes, October 16, 2003.

- AMS meeting, Binghamton, Rapid Decay and Geometry (joint with K. Ruane), October 12, 2003.

- University of Adelaide, Introduction to the Rapid Decay property, September 26, 2003.

- St. Stephens college, New Delhi, Groups and geometry, September 11, 2003.

- HRI Allahabad, Euler Characteristics for groups, September 9, 2003.

- TIFR Bombay, New examples of groups with the Rapid Decay property, Colloquium, August 7, 2003.

- Durham LMS Symposium, New examples of groups with the Rapid Decay Property, July 6, 2003.

- Université de Neuchâtel, Cubical CAT(0) complexes, June 21, 2003.

- Université de Neuchâtel, La conjecture de Bass, Colloque, June 16, 2003.

- Gaeta, Grigorchuck's 50th birthday, On L-delta spaces, parallel session , June 2, 2003.

- Journées Algèbres d'Opérateurs, Orléans, The Rapid Decay property for cubical CAT(0) groups, May 6, 2003.

- Kent State University, Group ring conjectures, Colloquium, March 20, 2003.

- Cornell University, On the exceptional group SL_3(\bf O), Lie groups seminar, February 14, 2003.

- Cornell University, Twisted idempotent conjectures, February 11, 2003.

- Université de Neuchâtel, Conjecture des idempotents tordue par un 2-cocycle, January 13, 2003.

- GGT 2002 Guwahati, Twisted idempotent conjectures, December 18, 2002.

- The Ohio State University, Twisted idempotent conjectures, November 26, 2002.

- Cornell University, The Rapid Decay property, October 17, 2002 in the Oliver Club.

- Binghamton University, The Bass conjecture for amenable groups, October 10, 2002.

- Cornell University, On the Bass conjecture, September 17, 2002.

- University of Adelaide, Around the Bass conjecture, May 3, 2002.

- TIFR Bombay, The Rapid Decay property for discrete groups, March 13, 2002.

- Université de Neuchâtel, Around the Rapid Decay property, February 13, 2002, SMS Geometry Meeting.

- ETH Zürich, From acyclic groups to the Bass conjecture for amenable groups, January 14, 2002, Algebra-Topology seminar.

- ETH Zürich, An introduction to property (RD) for discrete groups, November 7, 2001, Differential geometry seminar.

- Université de Lyon, Propriété (DR) et isométries grossières, November 6, 2001, Séminaire de Géométrie Noncommutative.

- CRM Barcelona, euroconference on proper group actions, On property (RD) for discrete groups, September 19, 2001.

- Penn State University, workshop on negatively curved spaces, Property (RD) for cocompact lattices in a finite product of rank one Lie groups, March 19, 2001.

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