Undergrad Zero divisors of an endomorphism ring

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SUMMARY

The discussion focuses on identifying zero divisors within the endomorphism ring E=End(A,A) of an Abelian group (A,+). Participants explore the binary operations defined as (f+g)(x)=f(x) + g(x) and (f*g)=f∘g. The challenge lies in finding concrete examples of zero divisors in this context. Additionally, the concept of nilpotent endomorphisms and matrices is introduced as a potential avenue for exploration.

PREREQUISITES
  • Understanding of Abelian groups and their properties.
  • Familiarity with endomorphism rings, specifically E=End(A,A).
  • Knowledge of binary operations in algebraic structures.
  • Concept of nilpotent endomorphisms and matrices.
NEXT STEPS
  • Research the properties of nilpotent endomorphisms in detail.
  • Study examples of zero divisors in various algebraic structures.
  • Explore the implications of endomorphism rings in category theory.
  • Investigate the relationship between endomorphisms and linear transformations.
USEFUL FOR

Mathematicians, algebraists, and students studying abstract algebra, particularly those interested in endomorphism rings and their properties.

Danijel
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Let (A,+) be an Abelian group. Consider the ring E=End(A,A) of endomorphisms on the set A, with binary operations +, and *, where (f+g)(x)=f(x) + g(x), and (f*g)=f∘g.
I have tried to find zero divisors in this ring, but I just couldn't come up with an example.
 
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Danijel said:
Let (A,+) be an Abelian group. Consider the ring E=End(A,A) of endomorphisms on the set A, with binary operations +, and *, where (f+g)(x)=f(x) + g(x), and (f*g)=f∘g.
I have tried to find zero divisors in this ring, but I just couldn't come up with an example.
Have you heard about nilpotent endomorphisms / matrices?
 

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