**Invited talks delivered in NITs and other reputed Institutions: **

1. Given Invited talk on “Exponential Fitted Methods for Singular Perturbation Problems” in the National Conference Conducted by **Sindu Mahavidyalaya & RRSSC (ISRO)** on 10^{th} March 2007.

2. Given Invited talk on “Numerical Solution of Differential Equations” in AICTE sponsored STTP on “Recent Trends in Engineering Mathematics” conducted by Department of Mathematics, **VNIT Nagpur** on 24^{th} July 2009.

3. Given Invited talk on “Optimization Techniques – Non Linear Programming” in AICTE sponsored STTP on “Environmental Engineering Systems Design and Optimization” organized by Department of Civil Engineering, **VNIT Nagpur** on 28^{th} November 2009.

4. Given Invited talk on “Singular Perturbations – An Introduction” in AICTE sponsored STTP on “Applied Numerical Methods for Scientists and Engineers” organized by Department of Mathematics, **VNIT Nagpur** on 24^{th} December 2009.

5. Given Invited talk on “Numerical Optimization” in AICTE sponsored STTP on “Applied Numerical Methods for Scientists and Engineers” organized by Department of Mathematics, **VNIT Nagpur** on 25^{th} December 2009.

6. Given invited talk on “Numerical Solution of Differential Equations: Finite Difference Method” in “Work shop on Mathematical Techniques (Under student curriculum activities, for M.Sc. students)” organized by Department of Mathematics, **RTM Nagpur University** on 30^{th} December 2011.

7. Given Invited talk on “Exponential Fitted Finite Difference Methods for Singular Perturbation Problems in Differential Difference Equations” in the Conference on New Vistas in Computational Fluid Dynamics in Engineering Conducted by Department of Mathematics, **National Institute of Technology, Warangal** during 27 – 29 January, 2012.

8. Given Expert lectures on “Numerical Analysis” for students of **National Institute of Technology Uttarakhand, Srinagar ( Ghardwal)**, during 29-01-2012 to 3-2-2012.

9. Given Plenary talk on “Numerical Methods for Singular Perturbation Problems” in UGC sponsored one day **national conference on “Recent advances in Mathematics and its applications (CRAMA – 2012) at Seth Narsingdas Mor Arts, Commerce and Smt. Godavaridevi Saraf Science College, Tumsar** on 30-03-2012.

10. Given an expert lecture in the workshop on ‘Improvement in University Results of Applied Mathematics’ organized by Department of Mathematics, Rajiv Gandhi college of Engineering & Research, Nagpur on 25/06/2012.

11. Given expert lectures on “Numerical Analysis” for students of **National Institute of Technology Uttarakhand, Srinagar ( Ghardwal)**, during 19-08-2012 to 26-08-2012.

12. Given an expert lecture on “Introduction to Numerical Analysis” in ‘**INSPIRE INTERNSHIP CAMP sponsored by Department of Science & Technology, **

(i) at Sri Velagapudi Ramakrishna Memorial College, Nagaram, Guntur (Dt.), A.P. on 22/10/2012.

(ii) at S.V.K.P. & Dr. K.S. Raju Arts & Science College, Penugonda, W.G. (Dt.), A.P. on 23/10/2012.

13. Given an expert lecture on “Singular Perturbation Problems: Numerical Treatment” in a national seminar on “Mathematical Modelling in Natural and Physical Sciences”** (sponsored by DST**), which was held at St. Theresa’s Autonomous college for women, Eluru, West Godavari (A.P.) during 16-17, November 2012.

14. Given two expert lectures on “Numerical solution of Differential equations” on 26/11/2012

“Asymptotic analysis of Singular perturbation problems” on 28/11/2012 in a short term training programming on “Modern Applications of Engineering Mathematics” conducted by **St. Vincent College of Engineering & Technology, Nagpur**.

15. Given an expert lectures in the STTP on “Fundamental of Numerical Computing” organized by me in Department of Mathematics, **VNIT Nagpur** during 10-14, December 2012.

16. Given an expert lecture on “Mathematics” in **‘INSPIRE INTERNSHIP CAMP sponsored by Department of Science & Technology,** at Sri Velagapudi Ramakrishna Memorial College, Nagaram, Guntur (Dt.), A.P. on 24/12/2012.

17. Delivered Invited Talks in the STTP on Recent Advances in Mathematics and its Applications to Science and Engineering (RAMASE-2013) in May 2013 at **Department of Mathematics, VNIT Nagpur. **

18. Given an expert lecture on “Interpolation & Approximation” on 20/08/2013 in a short term training programming on “Numerical Methods and its Application in Science and Engineering (NMASE) , conducted by** Department of Mathematics, National Institute of Technology, Jamshedpur **during 19-23, August, 2013.

19. Given an expert lecture on “Asymptotic Analysis and Initial value techniques for singular perturbation problems” on 20/08/2013 in a short term training programming on “Numerical Methods and its Application in Science and Engineering (NMASE) , conducted by** Department of Mathematics, National Institute of Technology, Jamshedpur **during 19-23, August, 2013.

20. Given an expert lecture on “Method of Matched Asymptotic Expansions and fitted methods for singular perturbation problems” on 2/12/2013 in a short term training programming on “Mathematical Modelling in Engineering , conducted by** Department of Mathematics, National Institute of Technology, Warangal **during 02-06, December, 2013.

21. Given an expert lectures in the STTP on “Advances in Computational Methods in Science and Engineering” organized by me in **Department of Mathematics**, **VNIT Nagpur** during 09-13, December 2013.

22. Given an expert lecture on “Perturbation methods” on 26/3/2014 in a short term training programming on “Computational flow and Transport: Modelling , Simulation and Algorithms”, conducted by** Department of Mathematics and Humanities, Sardar Vallabhbhai National Institute of Technology, Surat **during 24-28, March, 2014.

23. Given an expert lecture on “Numerical treatment of Singular perturbation Problems” on 26/3/2014 in a short term training programming on “Computational flow and Transport: Modelling , Simulation and Algorithms”, conducted by** Department of Mathematics and Humanities, Sardar Vallabhbhai National Institute of Technology, Surat **during 24-28, March, 2014.

24. Given expert lectures (on numerical solution of ODEs and PDEs, Singular perturbation problems and singularly perturbed differential difference equations) in the STTP on “Modelling, Computing, Simulation in Science and Engineering” organized by me in **Department of Mathematics**, **VNIT Nagpur** during 06-10, July 2015.

25. Given expert lecture on ‘Singularly perturbed differential difference equations’ in the STTP on “Mathematical modeling & computational techniques” organized by me in **Department of Mathematics**, **NIT Waraganl** during 07-11, December 2015.

26. Given expert lecture on ‘Singularly perturbed delay differential equations’ in the STTP on “Nonlinear Systems: Mathematical Modelling and Computer Simulations” organized by me in **Department of Mathematics**, **NIT Raipur** during 04-8, January 2016.

27. Given an invited talk on 'Exponentially fitted methods for singularly perturbed differential-difference equations " in the International conference on Mathematical Modelling, Differential equations, Scientific Computing & Applications held at **Department of Mathematics and Statistics, IIT Kanpur** during March 27-29, 2016.

28. Given an invited talk on ‘A fitted Numerical method for singularly perturbed parabolic partial differential equation with a small negative shift arising in control theory " in the International conference on ‘Recent Advances on *Theoretical and Computational Partial Differential Equations’ held at Punjab University, Chandigarh during 05-09 December, 2016.*

*29. Given an invited talk on ‘Adaptive mesh methods for singularly perturbed delay differential equations’ in the STTP on ‘Mathematical Modelling and Numerical Techniques’ held at NIT Warangal, during 9-14 October, 2018.*

*30. Delivered an invited talk on “ New finite difference methods for singularly perturbed delay differential equations” in the 4 ^{th} international conference on ‘Recent developments in theory, computation & Applications of differential equations to celebrate the 70^{th} Birthday of Prof. M.K. Kadalbajoo ” at South Asian University, New Delhi during 21-23, January 2019. *