All extensions of $C_2$ by $C_{2^{n+1}}\times C_{2^{n+1}}$ are good

Malkhaz Bakuradze

Let $C_m$ be a cyclic group of order $m$. We prove that if the group $G$ fits into an extension $1\to C_{2^{n+1}}^2\to G\to C_2\to 1$ then $G$ is good in the sense of Hopkins-Ku…