Let $G$ be a group of order $p^\alpha$, where $p$ is prime. If $H\lhd G$, then can we find a normal subgroup of $G/H$ that has order $p$?
Normal subgroups of p-groups
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group-theory
p-groups
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0It may help you to note that finite non-trivial $p$-groups have non-trivial centers. – 2012-06-24
1 Answers
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Theorem: a group $\,G\,$ of order $\,p^n\,,\,p\,$ a prime, $\,n\in\mathbb N\,$ , always has normal subgroup of order $\,p^m\,\,,\,\,\forall\, m\leq n\,\,,\,m\in \mathbb N$
Proof: Exercise, using that always $|Z(G)|>1\,$ and induction on $\,n\,$
So the comments by Gerry and Geoff close the matter.