The alternating group of degree $n$ ($n \in \N^+$) is the subgroup of $\SS_n$,
\[\AA_n = \{\sigma \in \SS_n : \par \sigma = 1 \}.\]
The alternating group of degree $n$ ($n \in \N^+$) is the subgroup of $\SS_n$,
\[\AA_n = \{\sigma \in \SS_n : \par \sigma = 1 \}.\]