If a finite group acts transitively on a set, does its center also acts transitively?

149 Views Asked by At

If $G$ is a finite group acts transitively on a set $X$, does the center $Z(G)$ also acts on $X$ transitively?

I don't see how this statement will be true but I can't come up with a counter example either.

Any help is appreciated.

1

There are 1 best solutions below

0
On BEST ANSWER

Hint: Think about the Symmetric group $S_3$ acting on $\{1,2,3\}$. What is the center of $S_3$? In fact, any $S_n$ for $n > 2$ acting on $\{1,2,\dots, n\}$ will work. Why?