- #1
jostpuur
- 2,116
- 19
Homework Statement
Suppose [itex]p[/itex] is some prime number, and [itex]G[/itex] a group such that [itex]\# G = p^n[/itex] with some [itex]n\in\{1,2,3,\ldots\}[/itex]. Prove that the center
[tex]
Z(G) = \{g\in G\;|\; gg'=g'g\;\forall g'\in G\}
[/tex]
contains more than a one element.
Homework Equations
Obviously [itex]1\in Z(G)[/itex], so the task is to find some other element from there too.
A hint is given, that conjugacy classes
[tex]
[x]=\{x'\in G\;|\; \exists y\in G,\; x'=yxy^{-1}\}
[/tex]
are supposed to be examined.
The Attempt at a Solution
Nothing to be done in sight.
I have some results concerning Sylow p-subgroups, but I don't see how they could be used.