Thread: What is this group? View Single Post
2008-06-09, 12:14   #2
R.D. Silverman

"Bob Silverman"
Nov 2003
North of Boston

22×5×373 Posts

Quote:
 Originally Posted by wpolly 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..
It appears to be a wreath product.