selected talks

Volumes and triangulations of flow polytopes of graphs slides

Discrete Math Days of the NorthEast, April 2020, Albany, NY.


Asymptotics of the number of standard Young tableaux of skew shape

Banff workshop video, October 2016


Hook formulas for skew shapes slides 1, slides 2

Banff workshop video

AMS sectional meeting Minneapolis, October 2016


The Tesler polytope slides

FPSAC Daejeon, South Korea, July 2015


Volumes of flow polytopes slides

open problem session, Stanley@70, Cambridge MA, June 2014


Combinatorics of diagrams of permutations slides

combinatorial algebra meets algebraic combinatorics, Halifax, January 24-26, 2014

joint math meetings AMS-MAA, contributed session geometric applications to combinatorics and K-theory, January 15-18, 2014

Mathematical congress of the Americas, session algebraic and enumerative combinatorics, Guanajuato, Mexico, August 5-9, 2013


Matrices over finite fields with restricted entries talk notes (pre-seminar), talk notes (made using xournal)

CanaDAM 2013, minisymposia on enumerative combinatorics, St. John's NL, June 10-13, 2013, slides

Combinatorics seminar, LaCIM, Université du Québec a Montréal, November 9, 2012

Combinatorics seminar, University of Washington, Seattle WA, October 3, 2012


Symmetry of trees and of colored factorizations slides

ECCO'12, Bogota, Colombia; June 13, 2012


Flow polytopes and the Kostant partition function for signed graphs slides

FPSAC Nagoya, Japan, August 3, 2012

combinatorics seminar, Dartmouth College, Hanover NH, February 22, 2012

AGC seminar, San Francisco State University January 25, 2012

combinatorics seminar, UC Davis January 25, 2012

combinatorial algebra meets algebraic combinatorics, Montréal, January 20-22, 2012

joint math meetings AMS MAA, session enumerative and algebraic combinatorics, Boston, January 5, 2012

XVIII Colombian congress of mathematics, Bucaramanga, Colombia, July 13, 2011

Bijections and symmetries for factorizations of long cycle and Jackson’s formula slides (updated 03/2014)

Combinatorics seminar, University of Minnesota, Minneapolis MN, April 11, 2014

winter meeting CMS, session on symmetric functions and generalizations, Ottawa, December 6-9, 2013

AMS spring eastern sectional meeting, session on combinatorics and integrability, Chestnut Hill MA, April 6, 2013, slides (conjecture on p. 39 now checked up to n=16)

LIAFA combinatorics seminar, Jussieu Paris France February 16, 2012

combinatorics seminar, MIT, Cambridge MA, March 30, 2011


Matrices with restricted entries and q-analogues of permutations slides (made using ytableau)

FPSAC Reykjavik, Iceland, June 13, 2011


q-analogues of derangements and fixed point free involutions and relations to q-rook numbers slides

combinatorics seminar, Dartmouth College, Hanover NH, February 17, 2011

CAGE seminar, UPenn, Philadelphia PA, February 8, 2011

combinatorics seminar, LIX, Ecole Polytechnique, Palaiseau France, September 29, 2010


The combinatorial nature of the Legendre transform slides

combinatorics seminar, LIX, Ecole Polytechnique, Palaiseau France, June 25, 2008

phd thesis defense


Combinatorics of colored factorizations, flow polytopes, and matrices over finite fields slides

MIT, Cambridge MA, April 23, 2012


postdoc, student seminars


Domino and lozenge tilings notes, slides

UMass Math Club, May 1, 2019


Counting orderings of acyclic graphs and why is π < 2φ? slides

Prof. talks Undergraduate Mathematics Student Association, UCLA, March 8, 2017


Introduction to Flow polytopes notes (in french)

guest lecture Catalan Combinatorics course, François Bergeron, Université du Québec à Montréal, October 28, 2013


The Harer-Zagier formula and rook placements notes (in french)

LaCIM/Cirget postdoc seminar, Université du Québec a Montréal, January 28, 2013


q-analogues of permutations and rook placements slides

Lehigh graduate student math seminar, Lehigh University, Bethlehem PA, November 23, 2010


Bijective enumeration of factorizations in the symmetric group slides

the Simple Person’s Applied Math Seminar (SPAMs), MIT, Cambridge MA, May 9, 2009