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	Professional Experience
	Work Experience: September 2014 - till date :  Professor (HAG) May 2008 - September 2014 :  Professor February 2003- May 2008 :  Associate Professor January 1999 - February 2003 :  Assistant Professor January 1996 - January 1999 :  Senior Lecturer Administrative work experience: Head, Department of Mathematics, IIT Guwahati,  January 2000 - January 2001, and  March 2006 - March 2009 Professor In-Charge, Alumni Affairs & External Relations, IIT Guwahati, October 2009 - August 2011 Awards and Fellowships: BOYSCAST Fellowship (2003) awarded by the DST, Govt. of India. Visiting Fellow, TIFR, Bangalore,  June 1994 Research Visits: Department of Mathematics, J.J. Strossmayer University of Osijek, Croatia,                   June 15 - July 15, 2017. Institute for Mathematics, TU-Berlin, Germany, June 01-July 31, 2014 Institute for Mathematics, TU-Berlin, Germany, July 02-10, 2010 Seminar Applied Mathematics, ETH Zurich, Switzerland, June 20-27, 2010 Equipe d'Analyse Numerique, Universite Jean Monnet de Saint Etienne, France, June 10-30, 2007 Institute for Mathematics, TU-Berlin, Germany, January 2004 Visiting Faculty,  Department of Mathematics, The University of Manchester, U. K., March 2003 - March 2004 Department of Mathematics, TU-Darmstdat, Germany, July 1999 Visiting Professor, Equipe d'Analyse Numerique, Universite Jean Monnet de Saint Etienne, France, June 01-30, 1997 Invited Talks: Invited lecture at the International Conference on Mathematical Modeling and Scientific Computing held at IIT Indore, Indore, India, during July 19-21, 2018. Invited lecture at the international Workshop cum Conference on Analysis and Applications held at IIT Madras, Chennai, India,  during June 18-22, 2018. Invited lecture at the International Conference on Linear Algebra and its Applications (ICLAA 2017) held at Manipal University, Manipal, India, during December 11 -15, 2017. Invited lecture at the International Conference on Matrix and Functional Analysis held at Jalandhar, Inndia, during November 29 - December 02, 2017. Mathematics colloquium lecture at the Department of Mathematics. J. J. Strossmayer University of Osijek, Croatia, June 01, 2017. Mathematics colloquium lecture at the Department of Mathematics, University of Zagreb,   Croatia, May 25, 2017. Plenary lecture at the 10th International Workshop on Accurate Solutions of Eigenvalue Problems (IWASEP-10) held at Dubrovnik, Croatia, during June 02- 05, 2014 Invited to deliver a plenary lecture at the 9th International Workshop on Accurate Solutions of Eigenvalue Problems (IWASEP-9) held at Napa Valley, USA, during June 4-7, 2012 Invited lecture at the International conference on Combinatorial Matrix Theory and Generalized Inverses of Matrices held at Manipal University, India, during January 10-11, 2012 Plenary lecture at the 8th International Workshop on Accurate Solutions of Eigenvalue Problems (IWASEP-8) held at TU- Berlin, Germany, during June 28- July 01, 2010 Invited lecture at the ICM2010 satellite conference on Functional Analysis and Operator Theory held at ISI Bangalore, India, during August 8-11, 2010 Invited lectures at the International Workshop on Approximate Solutions of Operator Equations and Eigenvalue Problems held at IIT Bombay during February 25-29, 2008 Invited lecture at the 73rd Annual Conference of Indian Mathematical Society (IMS) held at Pune, India, during December 27-30, 2007 A series of lectures at the Mathematics Spring School held at Universite Jean monnet de Saint-Etienne, France, during June 11-16, 2007 Invited lecture at the International workshop on Structured Perturbations and Distance Problems in Matrix Computations held Bedlewo, Poland, during March 26-30, 2007