# Cylindric Hecke characters and Gromov-Witten invariants via the asymmetric six-vertex model

## TL;DR

This paper links cylindric Hecke characters with Gromov-Witten invariants and the asymmetric six-vertex model, providing explicit combinatorial formulas and extending the boson-fermion correspondence to Hecke algebras.

## Contribution

It introduces cylindric Hecke characters and connects them to Gromov-Witten invariants and statistical mechanics models, extending algebraic correspondences.

## Key findings

- Constructed positive sub-coalgebras with Gromov-Witten invariants as structure constants.
- Provided explicit combinatorial formulas for cylindric Hecke characters.
- Connected cylindric broken rim hook tableaux with ice configurations in the six-vertex model.

## Abstract

We construct a family of infinite-dimensional positive sub-coalgebras within the Grothendieck ring of Hecke algebras, when viewed as a Hopf algebra with respect to the induction and restriction functor. These sub-coalgebras have as structure constants the 3-point genus zero Gromov-Witten invariants of Grassmannians and are spanned by what we call cylindric Hecke characters, a particular set of virtual characters for whose computation we give several explicit combinatorial formulae. One of these expressions is a generalisation of Ram's formula for irreducible Hecke characters and uses cylindric broken rim hook tableaux. We show that the latter are in bijection with so-called `ice configurations' on a cylindrical square lattice, which define the asymmetric six-vertex model in statistical mechanics. A key ingredient of our construction is an extension of the boson-fermion correspondence to Hecke algebras and employing the latter we find new expressions for Jing's vertex operators of Hall-Littlewood functions in terms of the six-vertex transfer matrices on the infinite planar lattice.