English

Character degrees in $2$-blocks of $\mathfrak{S}_n$ and $\mathfrak{A}_n$

Representation Theory 2026-01-21 v1

Abstract

Let pp be an odd prime. We show that for sufficiently large nn, every 22-block of Sn\mathfrak{S}_n and An\mathfrak{A}_n contains an ordinary irreducible character of degree divisible by pp. For almost all 22-blocks of An\mathfrak{A}_n, we classify whether it contains a rational valued ordinary irreducible character of degree divisible by pp.

Keywords

Cite

@article{arxiv.2601.13152,
  title  = {Character degrees in $2$-blocks of $\mathfrak{S}_n$ and $\mathfrak{A}_n$},
  author = {Bim Gustavsson},
  journal= {arXiv preprint arXiv:2601.13152},
  year   = {2026}
}

Comments

11 pages, 3 figures