Just quickly, what is a generator in a group?

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SUMMARY

A generator in a group is an element that can produce every element of the group through its powers. In the context of the group (Z_28,⊕), the identity element is a straightforward example of a non-generator. Additionally, any element that is a factor of 28, such as 2, 4, 7, or 14, also serves as a non-generator in this cyclic group.

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  • Understanding of group theory concepts, specifically cyclic groups.
  • Familiarity with the notation of modular arithmetic, particularly Z_n.
  • Knowledge of the properties of generators in algebraic structures.
  • Basic comprehension of factors and multiples in number theory.
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theperthvan
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Just quickly, what is a generator in a group?
I have a question:
"Give an example of an element in (Z_28,⊕) which is not a generator."
Cheers,
 
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g generates G if G= <g^r : r in Z>, i.e. it is the cyclic group generated by g.
 
As far as "Give an example of an element in (Z_28,⊕) which is not a generator." is concerned, an obvious element that is never a generator is the group identity. If you want a less trivial example try any element that is a factor of 28.
 

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