On Extending Type $B$ Parking Spaces

TL;DR

This paper explores generalizations of type B parking spaces as representations of signed symmetric groups, proposing a conjecture about their extension to larger groups and proving it in specific cases.

Contribution

It introduces a new family of representations generalizing type B parking spaces and proves the conjecture for certain values of parameters.

Findings

Conjecture on extending representations to larger groups.

Proof of the conjecture for m=3.

Proof of the conjecture for n ≤ 2.

Abstract

Armstrong, Reiner, and Rhoades defined for all Weyl groups $W$ a natural representation of $W$ called the $W$-parking space. The type $B$ parking space is the representation $\mathbb{C}[(\mathbb{Z}/(2n+1)\mathbb{Z})^n]$ of the $n$th signed symmetric group. We consider more general representations of the form $\mathbb{C}[(\mathbb{Z}/m\mathbb{Z})^n]$; we conjecture that this representation extends to the $(n+1)$th signed symmetric group for all $n$ and $m$. We prove this conjecture when $m = 3$ or when $n \leq 2$.