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Research Talks. 

• Tomsk 2022 

• Liverpool, March 2022

• ICTP, September 2015. 

• Group Theory Sangam, 2021. 

Expository. 

• Geometry of ICM-2010 logo, KSTA, Dec 2020. 

• Talks on Abel Prize, IISER Mohali 2020 (at 3:28:30)

• Math Clinic: An introduction to non-Euclidean geometry. 

•  सर्व  प्रथम चर्चा गणित की--द्वितीय सत्र  (Panel discussion on What is Mathematics. My lecture at 1:28:00, mostly in Hindi)

Mini-Courses. 

• CIMPA School (Kolkata): Hyperbolic geometry, January 2022. 

                 lecture 1.    lecture 2.     lecture 3. 

• Calcutta Math Society mini-course: Groups in Geometry, July 2021. 

                   lecture 1.    lecture 2.

• Pre-CIMPA Lecture, Banaras Hindu University: Hyperbolic Space and Teichmuller Theory, December 2021. 

                lecture-1.    lecture-2. 

Conferences: 

• Geometry and Topology Symposium, 87th Annual conference of the Indian Mathematical Society, December 4--7, 2021. 

• Geometry, Groups and Mathematical Philosophy, Conference in honor of Ravi Kulkarni's 80th Birthday, Bhaskaracharya Pratisthana, May 21--25, 2022. 

• ICTS Program: GGD-2017

• ICTS Discussion Meeting: SGPS, December 2018.