# group permutations 8

• Apr 24th 2009, 07:59 AM
mpryal
group permutations 8
Find a normal subgroup in A4 of order 4.

Please show steps. Thanks!
• Apr 24th 2009, 08:15 AM
ThePerfectHacker
Quote:

Originally Posted by mpryal
Find a normal subgroup in A4 of order 4.

Please show steps. Thanks!

$V=\{ \text{id},(12)(34),(13)(24),(14)(23)\}$

Show that $\sigma V = V\sigma$ for any $\sigma \in A_4$.