Invited speaker for The Mathematics of Michelle Wachs Conference, University of Miami (January 2015).

Speaker at Princeton University's Combinatorics Seminar. (February 2015).}

Speaker at Princeton University's Math Club, for the Pi-Day celebration (The Friday before Pi-Day 2015).

Speaker at Rutgers University Discrete Math seminar (April 2015).}

Speaker at the The 2015 Midwest Combinatorics Conference , University of Minnesota (May 2015).

Speaker at the AMS Special Session on Topological Combinatorics, Memphis, TN (October 2015).

2006, 2007, 2008, 2009. 2010, 2011, 2012, 2013. 2014, 2015, 2016 and 2017.

jrge@ms.uky.edu