Mathematics

1. Proof Methods.
   Two Invited Seminars at the Vidyasagar Science Olympiad (VSO) Nurturing Camp, held at Jagadish Bose National Science Talent Search (JBNSTS), March 11, 2026.
2. Number Theory.
   Two Invited Seminars at the Vidyasagar Science Olympiad (VSO) Nurturing Camp, held at Jagadish Bose National Science Talent Search (JBNSTS), March 11, 2026.
3. Ancient Indian Contributions to Mathematics: Disputes and Facts.
   Keynote Lecture at the National Conference on Ancient Indian Text, Science and Technology, sponsored by Indian Council of Philosophical Research (ICPR) and Anusandhan National Research Foundation (ANRF), organized jointly by the Centre for Indian Knowledge Systems (IKS) and the Department of Humanities and Social Sciences, IIT(ISM), Dhanbad, February 27, 2026.
4. Mathematical Sciences in Indian Knowledge System.
   Invited Lecture at the National Seminar on “Indian Knowledge System: An Interdisciplinary Dialogue”, organized by Departments of History, Mathematics, Philosophy, Political Science, Sanskrit & IQAC, Muralidhar Girl’s College, Kolkata, February 11, 2026.
5. Proofs, Disproofs and Fallacies.
   Keynote Lecture at the 12th International Conference on Mathematics and Computing (ICMC 2026), jointly organized by the Center for Mathematical and Financial Computing (CMFC) and the Center for Cryptology, Cybersecurity and Digital Forensics (C3-SDF) at LNM Institute of Information Technology (LNMIIT), Jaipur, in association with the Ramanujan Mathematical Society, the Cryptology Research Society of India (CRSI), and the Society for Electronic Transactions and Security (SETS), January 10, 2026.
6. Permutations and Combinations.
   Keynote Lecture at Mathematical Exposure Camp for School Students, jointly organized by the Department of Mathematics, Women’s College, Agartala, and the Tripura Mathematical Society, under the aegis of the National Board of Higher Mathematics (NBHM) and Homi Bhabha Centre for Science Education (HBCSE), Govt. of India, October 17, 2025.
7. Counting Indistinguishable Objects.
   Keynote Lecture at Mathematical Exposure Camp for School Students, jointly organized by the Department of Mathematics, Women’s College, Agartala, and the Tripura Mathematical Society, under the aegis of the National Board of Higher Mathematics (NBHM) and Homi Bhabha Centre for Science Education (HBCSE), Govt. of India, October 17, 2025.
8. Principle of Inclusion-Exclusion.
   Keynote Lecture at Mathematical Exposure Camp for School Students, jointly organized by the Department of Mathematics, Women’s College, Agartala, and the Tripura Mathematical Society, under the aegis of the National Board of Higher Mathematics (NBHM) and Homi Bhabha Centre for Science Education (HBCSE), Govt. of India, October 17, 2025.
9. Pigeon-Hole Principle.
   Keynote Lecture at Mathematical Exposure Camp for School Students, jointly organized by the Department of Mathematics, Women’s College, Agartala, and the Tripura Mathematical Society, under the aegis of the National Board of Higher Mathematics (NBHM) and Homi Bhabha Centre for Science Education (HBCSE), Govt. of India, October 17, 2025.
10. Geometric Visualization of Arithmetic and Algebra.
    Science Teachers’ Training Program for a new batch of Middle/High-School (Class V to XII) Mathematics teachers of various Bengali medium Govt. schools of West Bengal, organized by Jagadis Bose National Science Talent Search (JBNSTS) in association with the Dept. of Science & Technology & Biotechnology, Govt. of West Bengal, July 30, 2025.
11. Mathematics and Spirituality.
    Keynote Lecture at the 2nd International Conference on Mathematics, Logic and Computer Science (ICMLCS, July 26-27, 2025) organized by Allenhouse Group of Institutions, Rooma, Kanpur, India, July 26, 2025.
12. Some Fun Games with Probability and Certainty.
    One Day Workshop on Mathematics, organized jointly by Alumni Association of Government College of Education, Banipur, Magicians of Mathematics Foundation, and Cryptology Research Society of India, July 7, 2025.
13. Pythagoras’ Theorem: Mathematical and Historical Perspectives.
    Keynote Talk (R.C. Gupta Endowment Lecture) at the 38th Annual Congress of Assam Academy of Mathematics (September 30 – October 1, 2024), held at Gurucharan College, Silchar, Assam, India, September 30, 2024.
14. Journey of Logic from Philosophy to AI.
    Keynote Lecture and experience in serving as the Guest of Honour at the International Conference on Mathematics and Logics in Computer Science, organized by Allenhouse Institute of Technology, Kanpur, September 01, 2024.
15. Geometry and Mensuration: from Fun to Fundamentals.
    Workshop on Mathematics and Cryptography (in Bengali) for Class 8, 9 and 10 students of Ashoknagar Vidyasagar Bani Bhaban High School, Habra, North 24 Parganas, India, August 28, 2024.
16. How to Count: an Introduction to Combinatorics.
    Tutorial Lecture for potential Mathematics Olympiad aspirants, organized by Jagadis Bose National Science Talent Search (JBNSTS), Kolkata, India, February 8, 2024.
17. Applications of Mathematics in Data Security.
    Workshop on Mathematics-Cryptology-Computer Science for Higher Secondary students of Rahara Ramkrishna Mission High School, Rahara, India, September 19, 2018.
18. Mathematics in Art.
    Workshop on Mathematics-Cryptology-Computer Science for Higher Secondary students of (i) Jadavpur Sammilita Balika Vidyalaya, (ii) Baghajatin Balika Vidyalaya and (iii) Sir Nripendra Nath Girls High School, organized by Netaji Nagar College for Women, Kolkata, India, November 3, 2017.
19. A Refresher on Probability.
    Special Talk for Summer Internship in Cryptology (May 15 – July 7, 2017), Indian Statistical Institute (ISI), Kolkata, India, May 15, 2017.
20. Power and Limitations of Mathematical Logic.
    MathSpectrum – Symposium on varied flavours of mathematics for college teachers of any discipline, organized by Netaji Nagar College for Women, Kolkata, India, March 30, 2017.
21. Applications of Finite Fields.
    UGC Sponsored Refresher Course for College and University Teachers on Mathematics and Its Applications (Jan 02 – Jan 21, 2017), Department of Mathematics, Jadavpur University, Kolkata, India, January 21, 2017.
22. Theory of Finite Fields.
    UGC Sponsored Refresher Course for College and University Teachers on Mathematics and Its Applications (Jan 02 – Jan 21, 2017), Department of Mathematics, Jadavpur University, Kolkata, India, January 20, 2017.
23. Application of Mathematics in Science and Technology.
    Workshop on Mathematics-Cryptology-Computer Science for Higher Secondary students of (i) Jadavpur Sammilita Balika Vidyalaya, (ii) Lake Gardens School, (iii) Better High School and (iv) New Alipore Multipurpose School, organized by Netaji Nagar College for Women, Kolkata, India, December 8, 2016.
24. Mathematics for Computer Science.
    One-day State-Level Workshop on Mathematics, Computer Science and Cryptology, Department of Mathematics, Brahmananda Keshab Chandra (BKC) College, Kolkata, India, November 8, 2016.
25. Mathematical and Statistical Foundations of Cryptology and Security.
    Seminar for one-week academic visit to Indian Statistical Institute, Kolkata, India, by the students of Mathematics (Hons) and Statistics (Hons) of Ramnarain Ruia College, Mumbai, India, organized by Machine Intelligence Unit (MIU), Indian Statistical Institute (ISI), Kolkata, India, September 9, 2016.
26. Surprising Mathematics in Nature.
    Public Seminar at Netaji Nagar College for Women, Kolkata, India, March 30, 2016.
27. Mathematics in Nature.
    One-Day Workshop on Interesting Mathematical Concepts for Non-Mathematicians, South Calcutta Girls’ College, Kolkata, India, December 1, 2015.
    Click HERE to view / listen.
28. Modular Arithmetic in Block Ciphers.
    Course on Cryptography, Department of Computer Science & Engineering, Tripura Institute of Technology (TIT), Agartala, India, November 7, 2014.
29. Statistics in Cryptology.
    Seminar for one-week visit to Indian Statistical Institute, Kolkata, India, by the students of Post Graduate Diploma in Statistical Methods with Applications, Indian Statistical Institute North East Centre, Tezpur, Applied Statistics Unit (ASU), Indian Statistical Institute (ISI), Kolkata, India, December 7, 2011.
30. Theory of Metrics.
    Seminar at Centre for Distributed Computing, Jadavpur University, Kolkata, India, January 21, 2011.
31. Algebraic Inequalities.
    Training program for the Regional Mathematical Olympiad (RMO) 2008 qualified candidates (West Bengal Region), Indian Statistical Institute, Kolkata, India, December 29, 2008.