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Mar 7, 2017 at 23:43 comment added Derek Holt Yes that's right! I must have been conjecturing that there are no examples.
Mar 7, 2017 at 22:35 comment added LSpice @DerekHolt, I guess "no counterexamples" means "no examples", right?
Jan 11, 2014 at 11:44 comment added Derek Holt I verified that there are no counterexamples of order up to $2000$, but that is not surprising!
Jan 10, 2014 at 4:01 comment added Lev Borisov Have you tried running through the small groups GAP database?
Jan 7, 2014 at 21:22 answer added Marty Isaacs timeline score: 13
Jan 6, 2014 at 19:23 answer added Geoff Robinson timeline score: 12
Jan 3, 2014 at 10:02 comment added Derek Holt $H_1$ cannot be core-free, because that would imply $G=H_1N$ with $N$ an elementary abelian $p$-group and $O_p(H_1)=1$. But then $O_p(H_2)=1$ and $|H_1|=|H_2|$, so $G=H_2N$ and hence $H_2$ is maximal. The general case seems more complicated.
Jan 3, 2014 at 5:51 review First posts
Jan 3, 2014 at 6:35
Jan 3, 2014 at 5:36 history asked Moshe Newman CC BY-SA 3.0