English

Multiplicity upon restriction to the derived subgroup

Representation Theory 2019-09-18 v3

Abstract

We present a conjecture on multiplicity of irreducible representations of a subgroup HH contained in the irreducible representations of a group GG, with GG and HH having the same derived groups. We point out some consequences of the conjecture, and verification of some of the consequences. We give an explicit example of multiplicity 22 upon restriction, as well as certain theorems in the context of classical groups where the multiplicity is 11.

Keywords

Cite

@article{arxiv.1806.03635,
  title  = {Multiplicity upon restriction to the derived subgroup},
  author = {Jeffrey D. Adler and Dipendra Prasad},
  journal= {arXiv preprint arXiv:1806.03635},
  year   = {2019}
}

Comments

Removed the former Section 6, whose main result is proved by others

R2 v1 2026-06-23T02:24:55.520Z