The inductive McKay-Navarro conditions for the prime 2 and some groups of Lie type

TL;DR

This paper proves that the inductive McKay--Navarro conditions hold for the prime 2 in several groups of Lie type, advancing the understanding of the McKay conjecture and its refinements.

Contribution

It establishes the validity of the inductive McKay--Navarro conditions for prime 2 in certain Lie type groups, a key step towards verifying the conjecture.

Findings

Inductive conditions verified for prime 2 in several Lie type groups

Reduction of McKay--Navarro conjecture to these inductive conditions

Progress towards the proof of the McKay conjecture for specific groups

Abstract

For a prime $\ell$, the McKay conjecture suggests a bijection between the set of irreducible characters of a finite group with $\ell'$-degree and the corresponding set for the normalizer of a Sylow $\ell$- subgroup. Navarro's refinement suggests that the values of the characters on either side of this bijection should also be related, proposing that the bijection commutes with certain Galois automorphisms. Recently, Navarro--Spaeth--Vallejo have reduced the McKay--Navarro conjecture to certain "inductive" conditions on finite simple groups. We prove that these inductive McKay--Navarro (also called the inductive Galois--McKay) conditions hold for the prime $\ell = 2$ for several groups of Lie type, including the untwisted groups without nontrivial graph automorphisms.