| 1. | However, for n = 6 , {\displaystyle n=6,} there is an exceptional outer automorphism of S 6 {\displaystyle S_{6}} (of order 2), and correspondingly, the outer automorphism group of A 6 {\displaystyle A_{6}} is not C 2 {\displaystyle C_{2}} (the group of order 2) but rather C 2 × C 2 {\displaystyle C_{2}\times C_{2}} , the Klein four-group.
Cependant, pour n = 6 , |
