Printable View

Show that the center of a group is normal...

Quote: Originally Posted by szpengchao Show that the center of a group is normal... $\displaystyle H\triangleleft G$ if and only if $\displaystyle ghg^{-1} \in H$ for all $\displaystyle h\in H$ and $\displaystyle g\in G$. Using this definition it should be a straightforward proof.