Prove its abelian is this proof correct

  • Thread starter Thread starter natasha d
  • Start date Start date
  • Tags Tags
    Proof
Click For Summary
SUMMARY

The discussion centers on the proof of the equation (ab)^{n} = a^{n}b^{n} for any three consecutive integers n in the context of an abelian group G. Participants critique the clarity and correctness of a proof presented, highlighting that it incorrectly concludes ab = e for all elements a, b in G. The conversation emphasizes the need for a deeper understanding of group theory and the properties of abelian groups, particularly the commutative property.

PREREQUISITES
  • Understanding of group theory concepts, specifically abelian groups.
  • Familiarity with the properties of inverse elements in groups.
  • Knowledge of mathematical notation and proof techniques.
  • Basic comprehension of the significance of the identity element in group operations.
NEXT STEPS
  • Study the properties of abelian groups in detail, focusing on commutativity.
  • Learn about the structure and characteristics of group elements and their inverses.
  • Examine common proof techniques in abstract algebra, particularly in group theory.
  • Review examples of proofs involving the identity element and its implications in group operations.
USEFUL FOR

Students of abstract algebra, mathematicians exploring group theory, and anyone seeking to clarify their understanding of abelian groups and proof methodologies.

natasha d
Messages
19
Reaction score
0

Homework Statement


(ab)^{n}= a^{n}b^{n} for any 3 consecutive numbers n \inN

Homework Equations


for an abelian group G, ab=ba \foralla,b\inG
if a\inG, a has an inverse element also \inG such that aa^{-1} = e


The Attempt at a Solution


doesnt look right but here's the attempt

http://pics.livejournal.com/jackdnutter/pic/000013d1
 
Last edited by a moderator:
Physics news on Phys.org
Oster said:
that looks fishy...

yeah it does, which is why I asked. Whats wrong with it though? if someone could point out the flawed reasoning maybe it'd better my understanding of group theory.
Thanks for the link, the (ba)^{∞} proof was hilarious
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 5 ·
Replies
5
Views
1K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
11
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K