slides

Combinatorics of diagrams of permutations, Joel B. Lewis, Alejandro H. Morales, Journal of Combinatorial Theory Series A, Vol 137 (2016), 273-306, arXiv:1405.1608

• Fields Institute, combinatorics seminar, March 2014: slides (PDF)

• FPSAC 2014 Chicago, June 2014: poster (PDF)

Counting matrices over finite fields with support on skew Young diagrams and complements of Rothe diagrams

Aaron J. Klein, Joel B. Lewis, and Alejandro H. Morales,  J. Algebraic Combinatorics 39 (2014), pp. 429-456, arXiv:1203.5804 

• University of Washington, combinatorics seminar (Alejandro H. Morales): notes (PDF)

• Joint Meetings 2012, January 2012 (Joel Brewster Lewis): slides (PDF)

Matrices with restriced entries and q-analogues of permutations, Joel B. Lewis, Ricky Liu, Alejandro H. Morales, Greta Panova, Steven V Sam, Yan X Zhang, Journal of Combinatorics Vol 2, No 3 p 355-396, arXiv:1011.4539 

• University of Minnesota, combinatorics seminar, September 2011 (Steven V Sam): slides (PDF)

• FPSAC 2011 Iceland, June 2011 (Alejandro H. Morales and Yan X Zhang): slides (PDF)