Talks

1. AlCoVE: an Algebraic Combinatorics Virtual Expedition, June 8–9, 2026.
   Some observations and questions via Maple
   Abstract | Slides
2. International Conference on Enumerative Combinatorics and Applications, September 4-6, 2023.
   The idea of a grammatical calculus
   Abstract | Slides
3. Conference on the Occasion of the Retirement of Yeong-Nan Yeh, June 28, 2021.
   Context-free grammars for combinatorial enumeration
   Remarks | Slides
4. 26th British Combinatorial Conference, July 3-7, 2017.
   The spt-function of Andrews
   Abstract | Slides | Book Version, In: A. Claesson, M. Dukes, S. Kitaev, D. Manlove and K. Meeks (eds.), Surveys in Combinatorics 2017, 141-203, Cambridge Univ. Press, Cambridge, 2017
5. 22nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2010), San Francisco State University, August, 2010.
   Recent developments on log-concavity and q-log-concavity of combinatorial polynomials
   Slides
6. AMS Meeting, San Diego, January, 2008.
   The q-Zeilberger algorithm and the q-WZ method for infinite series
   Slides