Invited Colloqua and Seminars: (only few special talks)

1. Finite element Galerkin approximations to a quasilinear parabolic free boundary problems, Center for Mathematical Analysis, ANU, Canberra (23rd May, 1988).


2. Finite element methods for nonlinear free boundary problems, Department of Mathematics, University of Queensland, Brisbane (10th June, 1988).


3. Finite element approximation to nonlinear Stefan problem & 14th open problem, Department of Mathematics, University of New South Wales, Sydney (14th June, 1988).


4. On the existence of a weak solution to an evolution equation by method of time discretization, Department of Mathematics, University of Queensland, Brisbane (23rd January, 1991).


5. On convergence of finite difference schemes for generalized solutions of parabolic partial differential equations, CMA Advanced Seminar on Computational Mathematics, Center for Mathematics and Its Applications, ANU, Canberra (April, 1991).


6. On Rothe's method in evolution equations, CMA Colloquium, Center for Mathematics and Its Applications, ANU, Canberra (May, 1991).


7. Finite element methods for partial integro-differential equations of parabolic type, Department of Mathematics, City Polytechnique of HongKong (1st June, 1992)


8. Numerical methods for parabolic integro-differential equations, CMA Advanced Seminar on Computational Mathematics, Center for Mathematics and Its Applications, ANU, Canberra (July, 1992).


9. On convergence of finite difference schemes for generalized solutions of partial differential equations, Department of Mathematics, University of New South Wales, Sydney (July, 1992).


10. Finite element Galerkin approximations to parabolic integro-differential equations, Department of Mathematics, University of Western Australia, Perth (July, 1992).


11. Finite element methods for partial integro-differential equations, Global Analysis Research Center, Seoul National University, Seoul (November, 1993).


12. Discrete elliptic projection and generalized finite difference approximation for parabolic partial differential equations, Global Analysis Research Center, Seoul National University, Seoul (November, 1993).


13. On Galerkin Finite Element Approximations to Parabolic Integro-Differential Equations, Department of Mathematics, KAIST, Taejon (November, 1993).


14. Finite Element Galerkin Method for Integro-Differential equations of parabolic type, Pohang Institute of Science & Technology, Pohang (December, 1993).


15. Invited to address the Korean Numerical Analysis Group in Seoul (December, 1993) and gave a talk on Numerical Methods for Integro-Differential Equations


16. Numerical Methods for PIDE. Oxford Computing Lab, Oxford Univ.,UK (14th November, 1995).


17. Discrete in time methods for PIDE, Univ. Bath, UK (17th Novenber, 1995).


18. Numerical Methods for Rosenau Equation, Univ. Sussex, UK ( 22nd November, 1995).


19. Finite Element Methods for Partial Integro-Differential Equations, Imperial College, London (24th November, 1995).


20. Oldroyd Model of Viscoelastic Fluids: Some Computational Issues, Department of Mathematical and Computer Sciences, Colorado School of Mines, Golden (2nd October, 1998).


21. An Alternate Mixed Finite Element Method for Parabolic Partial Differential Equations, Center for Computational Mathematics, Department of Applied Mathematics, University of Colorado, (December, 1998).


22. An Alternate Mixed Method for Some Evolution Equations, Department of Mathematics (14th June, 2000), Yonsei University, Seoul (South Korea).


23. An H¹ Mixed Method for Parabolic Problems, Department of Mathematics (19th June, 2000), Korean Advanced Institute of Science and Technology, Taejon (South Korea).


24. A Posteriori Estimate: A Step Towards Adaptive Method, (June 23rd, 2000), Department of Mathematical Education, Seoul National University, Seoul (South Korea).


25. An Alternate Mixed Finite Element Method for Parabolic Equations, Department of Mathematics , IIT Delhi (19th January, 2001).


26. An Alternate Mixed Finite Element Galerkin Methods for Evolution Equations (July, 2001), BICOM, Department of Mathematics, Brunel University (U. K.).


27. The Mathematical Sciences at IITB : The Road Ahead, (December 18th, 2001), Department of Mathematics, IIT Kanpur.


28. An alternate mixed finite element method for some evolution equations, Department of Mathematics , Texas Tech Univ., Lubbock (USA) (1st July, 2002).


29. Industrial Mathematics: A new Avtar, Department of Mathematics, Ratnan College (Bhandup) (August, 2002).


30. Mixed Finite Element Methods for the Evolution Equations, Department of Mathematics, IIT Madras (September, 2002).


31. Navier-Stokes Equations: A millennium Open Problem, School of Mathematics, Anna University, Chennai (September, 2002).


32. Millennium Open Problem, University of Pune, Pune (October, 2002).


33. The Mathematical Sciences at IITB: The Road Ahead, Department of Mathematics, IIT Madras (September, 2002).


34. Industrial Mathematics: Key to Key Industries, BJB College, Bhubaneswar (Orissa) (February 28th, 2003).


35. Financial Mathematics and Its Prospects, in the Department of Mathematics at Ravenshaw College, Cuttack( 9th February, 2004).


36. A New Mixed Finite Element Method for Evolution Problems: An Old Wine in a New Bottle, Humboldt University, Berlin (December, 2005).


37. Discontinuous Galerkin methods : An Old Wine in a New Bottle, in the Graduate Seminar held in Humboldt University, Berlin, June 2007.


38. Finite element approximation of the equations of motion arising in the Oldroyd model, Colloquium talk, Berlin, June 2007.


39. Two hour talk on How to compute fair price in an American option: A case study from finance Institute of Mathematics and its Applications, Bhubaneswar, February 2008.


40. One hour talk on `Navier-Stokes Equation : A million dollar open problem, in IIT Kharagpur, March 2008, in IIT Madras 2009, IIT Delhi 2010,in IIT Guwahati 2010.