“On sign changes for almost prime coefficients of half-integral weight modular forms”, Number Theory Seminar Talk,Sheffield University, U.K. December 02, 2014.

“Modular degrees of Elliptic Curves”, British Mathematical Colloquium, University of York, U.K. March 25, 2008.

“Modular curves as algebraic curves over finite extensions of Q”, Number Theory Seminar Talk, Sheffield University, U.K., February 27, 2008.

“Modular Groups and Riemann Surfaces”, Number Thoery Seminar Talk, Sheffield University, U.K.,June 28, 2007.

National

International Conference on Number Theory at KSOM, Kozhikode, Jan 2020.

International workshop on Number Theory at NISER, Bhubaneswar, Dec. 2018.

Theoretical and computational aspects of BSD conjecture, conference, I.C.T.S. Bangalore, December 19, 2016 – December 22, 2016.

Theoretical and computational aspects of BSD conjecture, Workshop, I.C.T.S. Bangalore, December 12, 2016 – December 17, 2016.

“Lifting congruences to weight 3/2”, Number Theory Seminar Talk, IISER Pune, March 04, 2016.

“Central L-values of automorphic representations of GL(2) over number fields”, Number Theory Seminar Talk, IISER Pune, February 17, 2016.

“On sign changes for almost prime coefficients of half-integral weight modular forms”, Number Theory Seminar Talk, NISER Bhubaneswar, January 18, 2016.

“On Tate-Shafarevich groups of quadratic twists of elliptic curves”, I.I.T. Hyderabad, May 13, 2014.

“The Eisenstein elements inside the space of modular symbols”, I.I.T. Madras, September 30, 2013.

“The Doi-Naganuma Lifting”, Advanced Training in Mathematics Workshop, Hilbert Modular forms and varieties, Kerala School of Mathematics, Kozhikode, January 24, 2013.

“Mathematical Puzzles”, Workshop for school teachers, I.M.Sc. Chennai, November 17, 2012.

“Some solved and unsolved problems in mathematics”, Workshop for school students, I.M.Sc. Chennai, October 31, 2012. Video.

“Modular Degrees of Modular Abelian Varieties”, Math. Seminar, I.I.T. Madras, November 03, 2011.

“Modular curves and Modularity theorems”, Student Seminar, T.I.F.R, Mumbai July 22, 2011.

“Modular degrees of Elliptic Curves”, Mathematical Colloquim, T.I.F.R, Mumbai, January 13, 2011.

“Modular degrees of Elliptic Curves”, Number Theory Lecture, I.M.Sc. Chennai November 29, 2010.

“Elliptic Curves and Modular Forms”, Seethalakshmi Ramaswamy College, Trichy, Tamilnadu, January 22, 2009.

“Davenport Constant”, Number Theory Seminar Talk, H.R.I., Allahabad, July 16, 2006.

“δ-fine Tagged Partitions”, Gandhigram Rural Institute, Dindigul, Tamilnadu. As part of Birthday Celebrations of Srinivasa Ramanujan, December 22, 2003.

Contributed Talks

“Elliptic curves of rank 1 and p-part of the BSD conjecture”, I.M.Sc. Chennai, February 27, 2012.

“Locally indecomposable Galois representations”, I.M.Sc. Chennai, December 02, 2011.

“Operators on Hilbert Spaces”, Math. Seminar, Seethalakshmi Ramaswamy College, Trichy, Tamilnadu, August 11, 2003.