## Lectures on Scientific Topics

1. Invited Talk *“Ramanujan’s Second Last Discovery, Further Advancements and Generalizations” *Centre for Mathematical, Computational and Data Science, **Indian Association for the Cultivation of Science, Kolkata, India**, 6^{th} June 2018.

2. Invited Lecture *“Ramanujan’s Mathematics and its possible Applications to Applied Sciences”* School of Biosciences and Engineering, **Jadavpur University, Kolkata, India**, 21^{st }December 2017.

3. Plenary Address “*Generalization of Character Formulas”* 20^{th} International Mathematics Conference of the Bangladesh Mathematical Society, **University of Dhaka, Bangladesh,** December 8-10, 2017.

4. Special Lecture *“Introduction of Research Methodology in Mathematical Sciences” *Department of Mathematics, **Madda Walabu University, Ethiopia**, 20^{th }October 2014.

5. Invited Lecture “*On Certain Aspects of Generalized Special Functions and Integral Operators” * Department of Applied Sciences and Humanities, **Jamia Millia Islamia, New Delhi, India**, 21^{st} October 2011.

6. Invited Lecture *“On Hypergeometric Functions” *Department of Mathematics, **International Scientific Research and Welfare Organization, New Delhi, India,**18^{th }August 2009.

7. Invited Lecture “*Contribution of Indian Scholars in Mathematics, Science and Philosophy” *Department of Mathematics, **Franklin & Marshall College, Lancaster, USA**, 11^{th }June 2007.

8. Invited Lecture *“Applications of Group and Ring Theories in Bisosciences” *Department of Mathematics, **International Scientific Research and Welfare Organization, New Delhi, India,**25^{th }May 2007.

9. Invited Lecture *“Generalization of alpha sets” *Department of Mathematics, **International Scientific Research and Welfare Organization, New Delhi, India, **22^{nd }July 2005.

## Visitors number

19631