Are generators preserved under homomorphism?

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SUMMARY

The discussion centers on the preservation of generators under homomorphisms in group theory. Specifically, it addresses whether a homomorphism θ: G → H applied to a generator g of a cyclic group G results in θ(g) being a generator of the group H. The participants explore the implications of this relationship and consider counterexamples, particularly questioning if H must also be cyclic. The conclusion drawn is that θ(g) is not guaranteed to be a generator of H, as demonstrated by counterexamples where H is not cyclic.

PREREQUISITES
  • Understanding of cyclic groups and their generators
  • Familiarity with group homomorphisms
  • Basic knowledge of group theory concepts
  • Ability to analyze mathematical proofs and counterexamples
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  • Study the properties of cyclic groups in depth
  • Learn about group homomorphisms and their implications
  • Explore counterexamples in group theory
  • Investigate the structure of non-cyclic groups
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Mathematics students, particularly those studying abstract algebra, as well as educators and researchers interested in group theory and its applications.

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Sorry if this is such a basic question, but I'm not sure about the answer and having trouble finding it in my textbook. If I have a cyclic group G with generator g, and a homomorphism θ: G --> H, does this mean that θ(g) is a generator of H?
 
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Try proving it yourself, or find a counterexample. To get you started, if [itex]\theta(g) = h[/itex], then what is [itex]\theta(g^2)[/itex]?
 
Is H necessarily cyclic?
 

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