Say that [+] = external direct product of groups. Given that, Suppose that G is isomorphic to K and H is isomorphic to J. Prove that G[+]H is isomorphic to K[+]J
Follow Math Help Forum on Facebook and Google+
If are the isomorphisms, consider the map defined by . Show this is an isomorphism.
Originally Posted by cowgirl123 Say that [+] = external direct product of groups. Given that, Suppose that G is isomorphic to K and H is isomorphic to J. Prove that G[+]H is isomorphic to K[+]J See here
View Tag Cloud