- 
		Delivered 
		an invited talk in the international conference on Analysis and Discrete 
		Mathematics at Utkal University, March 26-27, 2022. 
- 
		Delivered 
		a series of lectures in the CEP on Physical Systems and Mathematical 
		Modelling (PSMM-2022) at NIT, Calicut, January 24-29, 2022. 
- 
		Delivered 
		an invited at the international conference on Numerical Analysis and 
		Differential Equation with Applications at SOAS Deembed to be 
		University, Bhubaneswar, during 20-22, 2019. 
- 
		Delivered 
		a series of invited lectures on Differential Equations at IIT Guwahati, 
		July 01-06, 2019.  
- 
		Delivered 
		an invited talk at KIIT University, Bhubaneswar on March 06, 2019. 
- 
		Delivered 
		an invited talk in the international conference on Recent Advances in 
		PDE: Theory, Computations and Applications at IIT Bombay during June 
		8-10, 2017. 
- 
		Delivered 
		a series of lectures at NIT Silcher, February 22-27, 2017. 
- 
		Delivered 
		an invited talk in the Dept. of Applied Mathematics, DIAT, Pune, January 
		15, 2016. 
- 
		Delivered 
		an invited talk in the 12th international conference on vibration 
		problems (ICOVP 2015) at IIT Guwahati, December 14-17, 2015. 
- 
		Delivered 
		a series of lectures at CIMPA Pre School at IIT Bombay, June 24 - July 
		17, 2015.  
- 
		Delivered 
		a series of lectures at Postgraduate Level Training Programme at IIT 
		Kanpur, May 18 - June 4, 2015. 
- 
		Delivered 
		a lecture at KIC-TEQIP Short Term Course on Mathematics for Engineering 
		Education, Department of Mathematics, IIT Guwahati, February 16–20, 
		2015. 
- 
		Delivered 
		an invited talk in the international conference MMCSA, IIT Kanpur, 
		December 31, 2013 - January 2, 2014 . 
- 
		Delivered 
		an invited talk at the 42nd annual convention of Orissa Mathematical 
		Society held at KIIT University, Bhubaneswar, January 4-5, 2014. 
- 
		A series 
		of lecture delivered at QIP Short term Course at Department of 
		Mathematics, IIT Guwahati, May 20-24, 2013. 
- 
		Delivered 
		a lecture at NPTEL Workshop at Royal Group of Institutions, Guwahati, 
		April 29-30, 2013. 
- 
		Delivered 
		an invited talk at RTMCS, National Workshop at Institute of Advanced 
		Study in Science and Technology (IASST), Guwahati, November 28-30, 2012. 
- 
		Delivered 
		an invited talk at RTMCS, National Workshop at Institute of Advanced 
		Study in Science and Technology (IASST), Guwahati, November 28-30, 2012. 
- 
		Delivered 
		a series of lectures at Advanced Level Training Programme on 
		Differential Equations at IIT Bombay, June 10- 30, 2012. 
- 
		Delivered 
		a series of lectures in the instructional workshop on FEM at TIFR Center 
		for Applicable Mathematics, Bangalore, July 2-13, 2012. 
- 
		Delivered 
		an invited talk at Indo-German Conference on Modeling, Simulation and 
		Optimization in Application at Darmstadt, Germany, September 5-7, 2012. 
- 
		Delivered 
		a series of lectures in the national workshop on ”Applications of 
		Mathematics” at NIT Silcher, August 2-4, 2012. 
- 
		Delivered 
		a series of lectures on Advanced Workshop on Evolution Equations:Theory, 
		Modeling & Applications at Indian Institute of Technology Kanpur, 
		December 2-6, 2012. 
- 
		Delivered 
		an invited lecture National Conference on Evolutionary Equaitons: 
		Theory, Modeling & Applications at IIT Kanpur during December 7-8, 2012. 
- 
		 Delivered 
		a talk in the ICIAM 2011 at Vancouver, Canada during July 18-22, 2011. 
- 
		Delivered 
		a talk in the International Conference on Scientific Computation and 
		Differential Equations (SciCADE 2011) held at the University of Toronto, 
		Canada, July 11-15, 2011. 
- 
		Delivered 
		a lecture in the International Conference on CPDE held at the Department 
		of Mathematics, IIT Bombay, 2008. 
- 
		Delivered 
		a talk at the International Conference ICIAM - 2007, Zurich, 
		Switzerland, 2007. 
- 
		Delivered 
		an invited talk at the Department of Mathematics(Golden Jublee 
		Celebration), Indian Institute of Science, Bangalore, 2006. 
- 
		Delivered 
		an invited talk Department of Mathematics, Sambalpur University, Orissa, 
		2006 (National Conference). 
- 
		Delivered 
		an invited talk at the Department of Mathematics, Indian Institute of 
		Technology Kanpur, 2006. 
- 
		Delivered 
		an invited talk at the Department of Mathematics, ISSAT, Guwahti, 2002. 
		• Delivered an invited talk at the Department of Mathematics, Texas A&M 
		University, Texas, 2004.  
- 
		Delivered 
		a talk at the Department of Mathematics, Indian Institute of Technology 
		Guwahati, 2001. 
- 
		Delivered 
		an invited talk in the International Conference at the Department of 
		Mathematics, Indian Institute of Technology Kanpur, 2001. 
- 
		Delivered 
		a lecture at the Department of Mathematics, Khokrajhar Science College, 
		2001. 
- 
		Delivered 
		an invited talk at the national conference held at the Department of 
		Mathematics, Utkal University, Orissa, 1998. 
- 
		Delivered 
		an invited talk at the international conference at the Department of 
		Mathematics, IIT BHU, Varanasi, 1998. 
- 
		Delivered 
		an invited talk at the international conference Department of 
		Mathematics, University of Delhi, 1998. 
- 
		Delivered 
		an invited talk at the Department of Mathematics, Indian Institute of 
		Technology Kanpur, 1998. 
- 
		Delivered 
		a lecture at the Department of Mathematics, Indian Institute of Science, 
		Bangalore, 1997.  
- 
		Delivered 
		an invited talk at the Department of Mathematics, University of 
		Hyderabad, 1996.