Definition:Idempotence

Definition
Idempotence is a property of an algebraic system, or an element of an algebraic system such that:
 * $E \circledcirc E = E$

for an object $E$ and an operation $\circledcirc$.

Let $S$ be a set.

Also known as
The concept of idempotence can also be referred to as idempotency.

Also see

 * Definition:Idempotent Semigroup