3) Let G and H be two groups with e and e' as identities. Define P = G x H by P = G x H = { (g,h) | g € G,h € H} with algebraic operation (g1, h;)(92, h2) = (9192, h,h2). Prove that the set P' = {(g', h') I g' E Z(G), h' € Z(H)} is a subgroup of P. Also show that P' is the center of P. (9)
3) Let G and H be two groups with e and e' as identities. Define P = G x H by P = G x H = { (g,h) | g € G,h € H} with algebraic operation (g1, h;)(92, h2) = (9192, h,h2). Prove that the set P' = {(g', h') I g' E Z(G), h' € Z(H)} is a subgroup of P. Also show that P' is the center of P. (9)
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.6: Quotient Groups
Problem 23E
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