University of Minnesota Combinatorics Seminar
Friday, February 17, 2012
3:35pm in 570 Vincent Hall



Involutions on Baxter Objects

Kevin Dilks

University of Minnesota


Abstract

Baxter numbers are known to count several families of combinatorial objects, all of which come equipped with natural involutions. In this talk, we'll describe the bijections between these objects, and discuss why the known bijections between these objects respect these involutions. We'll also give a formula for the number of objects fixed under this involution, showing that it is an instance of Stembridge’s “q = -1 phenomenon”.