Lifts of Brauer characters in characteristic two, II

Junwei Zhang, Xuewu Chang, Ping Jin +1

In 2007, J. P. Cossey conjectured that if $G$ is a finite $p$-solvable group and $\phi$ is an irreducible Brauer character of $G$ with vertex $Q$, then the number of lifts of $\phi$ is a…