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Apr 20, 2022 at 0:45 comment added Bob I mean,under the conditions that $G$ is solvable, $\pi(G)= \{2,m,n\}$, $O_{2}(G)=1$.Can we figure out $O_{2}(\bar{G})$ by comparing the orders?
Apr 19, 2022 at 15:21 comment added Derek Holt I don't know what you are asking. What do you mean by "determine the $O_2(\overline{G})$"?
Apr 19, 2022 at 14:34 comment added Bob So we can not determine the $O_{2}(\bar{G})$?
Apr 19, 2022 at 13:54 history answered Derek Holt CC BY-SA 4.0