Find a normal subgroup in A4 of order 4. Please show steps. Thanks!
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Originally Posted by mpryal Find a normal subgroup in A4 of order 4. Please show steps. Thanks! $\displaystyle V=\{ \text{id},(12)(34),(13)(24),(14)(23)\}$ Show that $\displaystyle \sigma V = V\sigma$ for any $\displaystyle \sigma \in A_4$.
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