Share
Explore BrainMass

Binary Operations : Idempotence

An element e of a monoid M is called an idempotent if e^2 = e. If M is finite, show that some positive power of every element is an idempotent.

Solution Preview

Prove by induction:
e is idempotent, then e^2=e (1)
Assuming when the positive power of e is n=k, then (e^k) ...

Solution Summary

Idempotence of powers of elements in a monoid is demonstrated by mathematical induction.

$2.19