A character relationship between symmetric group and hyperoctahedral group

Abstract

We relate character theory of the symmetric groups $S_{2n}$ and $S_{2n+1}$ with that of the hyperoctahedral group $B_n=(\mathbb{Z}/2{)}^n⋊S_n$, as part of the expectation that the character theory of reductive groups with diagram automorphism and their Weyl groups, is related to the character theory of the fixed subgroup of the diagram automorphism.

This version contains an appendix by Arvind Ayyer