Stuttgart (Aug. 94, Nov.-Dec. 95, Sept 97)

IBM. New York (Aug. 1995)

Ecole Polytechnique : March 96 (Séminaire Mécanique "Ile de France"), June 96 (LADHYX)

Clermont-Ferrand (March and Nov. 1996)

Marseille (CPT) (April 96)

Ferrara (Italie) (May 1996 and May 1997)

Hong-Kong (2 Univ) (Sept 96)

Lyon (ENS) Jan. 98

Cambridge (DAMTP) Jan. 98

Istanbul (Theor Phys & Appl. Math Inst.) Mai 98

Nizhny Novgorod (INCAS and University) Nov. 98

Paris (lab. Ana. Num., Paris VI) June 99

Cachan ENS (CMLA) Feb. 2000

Oxford (Math Inst) June 2000

Lausanne (EPFL) Dec 2000

Paris (LMM) Jan 2001

Bordeaux April 2001

Hull, UK (HIMSA) Nov. 2001

Marseille (CPT) April 2002

La Foux d’Allos (Colloque CKP) Juin 2002

Univ. de Milano Bicocca, Ist. di Alta Matematica, Nov. 2002 (4 lectures)

ENS Cachan, France, Dec 2002

LMM, Paris 6, France, Jan 2003

Virginia-Tech, Blacksburg, Virginia, USA, April 2003

Technical University of Denmark, Lyngby, Danemark (June 2003) (8 lectures)

Ecole Polytechnique, LADHYX, Palaiseau, France, Sept 2003

Purdue Univ., West Lafayette, USA, Dec. 03

Fields Institute Colloquium, Toronto, Canada, Dec. 03

UPS Toulouse (Math. Lab.), France, Jan 04

Toulon (USTV) France, March 2004

Indian Inst. Technology (Bombay) Jan 2005 (2 lectures)

Tata Institute , Bangalore, Jan 2005 (2 lectures)

Indian Inst. Sci., Math dept,Bangalore, Jan 2005

Univ. of Illinois-Chicago, USA, Math. dept, April 2005

Purdue Univ., Math dept.,West Lafayette, USA, April 2005

Boston Univ., Math dept., USA, june 2005

St Etienne de Tinée, France. Summer school, 6 lectures, Aug-Sept 2005

Besançon Univ., Math dept., France, Jan 2006

Journée scientifique en l’honneur de Claude Do, Montpellier, France, Feb 2006.

UPS Toulouse, MIG, April 2006

IRPHE, Université de Aix-Marseille, April 2006

Université Paris XI - Orsay, May 2006

Purdue Univ., Math dept.,West Lafayette, USA, Sept 2006

Univ. of Hamilton, Math. Dept., Canada, Sept 2006

LMM, Paris VI, France, Oct. 2006

Univ. Paris Sud-Orsay, Math Dept, Orsay, Sept 2007 (J.C.Saut 60th birthday)

Univ. of Surrey (UK), Jan 2008

Univ. Paris Sud-Orsay, Math dept, Orsay, May 2008

ENS Lyon, Lyon, Dec 2008 

Univ. Nancy, IECN Feb. 2009

Univ. Metz, Math Lab. Feb. 2009

Univ. Lyon 1, Math Lab. March 2009

Univ. Paris Sud - Orsay, Math dept, Orsay, April 2009 (4h30 mini-course)

Univ. Liège (Belgium), Physics Dept. Ecole Doctorale Thématique, May 2009 

Ecole d'été du Non Linéaire , Peyresq (Alpes de Hte Provence), Sept. 2009

Ecole d'Hiver de Saint Etienne de Tinée (Alpes maritimes), Jan. 2010 (4h30 mini-course)