) If we have an epimorphism from G to G’, then we know G must be the same or of bigger order than G’. (Can you explain why?)
) If we have an epimorphism from G to G’, then we know G must be the same or of bigger order than G’. (Can you explain why?)
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.6: Homomorphisms
Problem 16E: 16. Suppose that and are groups. If is a homomorphic image of , and is a homomorphic image of ,...
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a.) If we have an epimorphism from G to G’, then we know G must be the same or of bigger order than G’. (Can you explain why?)
b.) If G and G’ are of the same order, it’s pretty easy to get the isomorphism. (Again, can you explain why?)
c.) If the order of G is larger than the order of G’ AND the operation is maintained by this mapping, where do all of the “extra” elements in G have to be mapping?
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