Let . Show that is isomorphic to .
Last edited by Chris L T521; Nov 21st 2009 at 10:44 PM.
Reason: TeXified question
Follow Math Help Forum on Facebook and Google+
Take then let and we have iff and the least such number is (the min. comm. mult.) and it's well known that then since ...
Z12 -> G
defined by n -> (n mod 4, n mod 3 ) is 1:1 and onto.
(a,b) -> 3*a + 4*b mod 12
should also be 1:1 and onto.
View Tag Cloud