Institutions Visited as Invited Researcher
- September, 2015 (1 month). Institute de Mathétiques de Toulouse , Université Paul Sabatier, Toulouse, France. Invited.
- November, 2014 (1 month). Laboratoire LIX , École Polytechnique, Palaiseau-Saclay, France. Invited.
- May, 2012 (1 week). Fields Institute , Toronto, Canada. Invited.
- October, 2009 (3 weeks). Fields Institute , Toronto, Canada. Invited.
- March, 2007 (1 month). Laboratoire LIX , École Polytechnique, Palaiseau-Saclay, France. Invited.
- April, 2007 (2 weeks). Institute of Mathematics and its Applications (MA) , University of Minnesota, Minneapolis, USA. Invited.
- March, 2005 (1 month). Laboratoire LIX , École Polytechnique, Palaiseau-Saclay, France. Invited.
- May, 2003 (1 month) . Laboratoire MIP (now part of Institute de Mathéquies de Toulouse ), Université Paul Sabatier, Toulouse, France. Invited.
- July, 2000 (2 weeks) . Institute für Mathematik der Humboldt Universität zu Berlin, Germany. Invited.
- October, 1999 (2 weeks) . Department of Mathematics of the City Univerity of Hong Kong, China. Invited.
- March-May, 1999 (3 months). Laboratoire GAGE ( (now part of the Laboratoire LIX ), École Polytechnique, Palaiseau-Saclay, France. Invited.
- September, 1998 (3 weeks). Mathematical Sciences Research Institute (MSRI) ), Berkeley, CA, USA. Invited.
- October-December, 1995 (3 months). Laboratoire GAGE ( (now part of the Laboratoire LIX ), École Polytechnique, Palaiseau-Saclay, France. Invited.
- March-June, 1987 (4 months). Institut de Recherche Mathématique de Rennes , Rennes, France. Post-Doctoral.
- August, 1985 (1 month). CIMPA-ICPAM (UNESCO) , Nice, France. Pre-Doctoral.