Tuesday, January 28, 2003 in K9509, SFU
3:30 - 4:30
York University, Canadian Research Chair
Title:"Quasi-symmetric polynomials and Temperley-Lieb invariants and covariants."
Abstract:Quasi-symmetric polynomials were introduced in enumerative combinatorics by Gessel and Stanley for the enumeration of P-partitions. Recent developments show that these polynomials can be view as Temperley-Lieb polynomials invariants. We will recall the basic facts on quasi-symmetric polynomials and survey some of the striking recent developments concerning them. We will also look at the Temperley-Lieb analogue of the diagonally symmetric polynomials and the diagonally symmetric harmonics.