- #1
Mr Davis 97
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Homework Statement
Title
Homework Equations
The Attempt at a Solution
This would seem to be very easy problem, since it's intuitively obvious that if two groups are isomorphic, and one is cyclic, then the other is cyclic too. However, I can't seem to formalize it with math.
Here is an idea. We can define that a group is cyclic by saying that for all b in G, there exists an a such that ##a^n = b## for some integer n. Now if G is cyclic, and we have an isomorphism ##\phi## from G to G', then it is true that ##\phi (a) ^n = \phi (b) = b'##, which means that G' is also cyclic. Does this sketch of a proof the right idea?