Professional Visits as Visiting Professor:
1. Visiting Professor at MathematikInstitut, University of Koblenz-Landau, Germany under ERASMUS+, July 1–15, 2018.
2. Visiting Professor at MathematikInstitut, University of Koblenz-Landau under ERASMUS+, January 8–20, 2018.
3. Visiting Professor at AG Technomathematik, TU Kaiserslautern, Germany & Fraunhofer ITWM, Kaiserslautern, Germany during the months May-July every year from 1994 to 2018 (till date).
4. Visiting Professor, Department of Mathematics, ITB Bandung, Indonesia during June 2009.
5. Visiting Professor, Department of Computational and Applied Mathematics, University of Witwatersrand, South Africa during August 2010.
6. Visiting Professor, Institute for Analysis and Numerik, University of Magdeburg, Germany during June 2003 and July 2005.
7. Visiting Professor AG Scientific Computing, TU Darmstadt, Germany during May 2004 and June 2005.
8. Visiting Professor, International Centre for Theoretical Physics (ICTP), Trieste, Italy during the month March 2004.
9. Visiting Faculty, School of Computational and Applied Mathematics, University of Witwatersrand, South Africa during the month December 1999.