Brauer A(infinity) condition at primes 2 and 3

Establish the Brauer A(infinity) condition for the remaining primes 2 and 3 for finite groups of Lie type in non-defining characteristic.

Background

The main theorem proves the Brauer A(infinity) condition when the prime is good and non-defining. The introduction states that this leaves only primes 2 and 3 unresolved, since these are the remaining potentially bad primes for the groups under consideration.

References

This result leaves Brauer $A(\infty)$ condition open only for the primes 2 and 3.

— The Brauer $A(\infty)$ condition and Navarro's conjecture on Brauer characters under coprime actions  (2609.26441 - Feng et al., 22 Sep 2026) in Section 1, Introduction