Hall-Littlewood polynomials and a Hecke action on ordered set partitions

Abstract

We construct an action of the Hecke algebra $H_n(q)$ on a quotient of the polynomial ring $F[x_1,\dots ,x_n]$, where $F=\mathbb{Q}(q)$. The dimension of our quotient ring is the number of $k$-block ordered set partitions of $\{1,2,\dots ,n\}$. This gives a quantum analog of a construction of Haglund-Rhoades-Shimozono and interpolates between their result at $q=1$ and work of Huang-Rhoades at $q=0$.

arXiv comment11 pages