Indian Statistical Institute, Delhi, June-July, 2019 and March, 2021.

Universidad Del Cauca, Popayan, Colombia, Dec, 2018.

University of Crete, Heraklion, Greece, 30th Oct- 6th Nov, 2017.

Harish Chandra Research Institute, Allahabad, India, Feb-March, 2016.

University of Paris VI, Jussieu, Paris, France, 16th Sep- 15th Oct, 2016.

University of Debrecen, Debrecen, Hungary, 16th Oct- 21st Oct, 2016.

Tata Institute of Fundamental Research(TIFR) Mumbai, India, Nov-2016 and Nov-Dec, 2014.

Rational points on certain super elliptic curves, Arithmetic Geometry Seminar, April, 2021, National and Kapodistrian University of Athens, Athens, Greece.

Teorema de Fermat: Pasado, Presente y Futuro , Seminario MATDIS, Universidad del Cauca, Colombia, Sept, 2020.

Repdigits in Narayana's cows sequence and its consequences,  IIIT Delhi,  June 2019.

Erdős- Selfridge superelliptic curves (colloquium) ,  Universidad del Cauca, Popayan, Colombia, December, 2018.

Erdős- Selfridge superelliptic curves and their rational points, University of Waterloo, Oct, 2018. 

Variants of Erdős- Selfridge superelliptic curves and their rational points, University of Pierre and Marie Curie, Paris VI, France, 16th Oct, 2017.

Variations of Shifted Schäffer’s Equation, University of Debrecen, Hungary, 21st Oct, 2016.

On variations of Shifted Schäffer’s Equation, University of Pierre and Marie Curie, Paris VI, France, 29th Sept, 2016.

Some Equations Involving Binary Recurrence Sequences, Indian Statistical Institute,  Delhi,  August,  2015. 

On Ramanujan-Nagell Equation, Indian Statistical Institute,  Delhi,  August,  2014.

On Roth’s Theorem and Its Applications, Indian Statistical Institute,  Delhi,  August, 2013.