What is the order of an element in a finite abelian group of odd order?

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SUMMARY

The discussion centers on proving that in a finite abelian group G of odd order, the product of all elements equals the identity. It is established that if every element in G has an inverse that is not itself, the statement holds true. The challenge lies in demonstrating that no element can be its own inverse, which leads to analyzing the order of such elements.

PREREQUISITES
  • Understanding of group theory concepts, specifically finite abelian groups.
  • Familiarity with the concept of an element's order in group theory.
  • Knowledge of inverses in group structures.
  • Basic proof techniques in abstract algebra.
NEXT STEPS
  • Study the properties of finite abelian groups in detail.
  • Learn about the classification of groups by their orders.
  • Explore the implications of the order of an element in group theory.
  • Investigate examples of finite groups to solidify understanding of inverses and identity elements.
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Students of abstract algebra, mathematicians focusing on group theory, and anyone interested in the properties of finite abelian groups.

arshavin
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Homework Statement



Let G be a finite abelian group of odd order. Prove that the product of all the elements
of G is the identity.




The Attempt at a Solution



easy to see the case when each element has inverse which is not itself.
 
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Indeed, if every element has an inverse which is not itself, then this is true. So, what you need to do is actually show that no element has itself as inverse. So, assume that g has itself as inverse, then what is the order of g?
 

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