Another (q,t)-world

Speaker: Prof. Dennis Stanton
Date: 25/03/2015
Time: 14:00 - 16:00

Location: RISC Seminar room

A well studied (q,t)-analogue of symmetric functions are the Macdonald polynomials. In this talk I will survey another (q,t)-analogue, where q is a prime power from a finite field and t is an indeterminate. Analogues of facts about the symmetric group S_n are given for GL_n(F_q), including (1) counting factorizations of certain elements into reflections, (2) combinatorial properties of appropriate (q,t)-binomial coefficients, (3) Hilbert series for invariants on polynomial rings. Some new conjectured explicit Hilbert series of rings of invariants are given. This is joint work with Joel Lewis and Vic Reiner.