Thread: What is this group? View Single Post
 2008-06-09, 07:30 #1 wpolly     Sep 2002 Vienna, Austria 3·73 Posts What is this group? on http://www.win.tue.nl/~aeb/graphs/Brouwer-Haemers.html, I see that the automorphism group of a certain graph is described as $3^4:((2\times S_6).2)$. I understand this group is a composition of $Z_3^4,Z_2\times S_6,Z_2$,but exactly what does the . and : represent? Is it semidirect product, wreath product, or something else? I've been unable to find more informations on this notation elsewhere.. Last fiddled with by wpolly on 2008-06-09 at 07:54