**Lecture notes from courses taught at the Institute of Mathematics & Applications, Bhubaneswar (2010-2012)**

**Slides from select mathematics and physics lectures (2005-2012)**

###### Research

- Introduction to quantum groups (2005)
- Motives and varieties from graphs I: Bloch-Esnault-Kreimer (2006)
- Motives and varieties from graphs II: chromatic polynomial and intersection number (2006)
- Renormalization Hopf algebra, multiple zeta values and mixed Tate motives (2006)
- Periods, geometry and arithmetic in quantum fields and strings (2010)
- Noncommutative geometry and quantum gravity: speculations (2010)
- Motivic geometry of Feynman amplitudes (2012)