# Idempotence Idempotence is the property of certain operations in mathematics and computer science whereby they can be applied multiple times without changing the result beyond the initial application. ### Examples A few good examples are listed [here](https://en.wikipedia.org/wiki/Idempotence#Idempotent_functions). Namely we have: * The identity function * Constant functions * the idempotent [endomorphisms](https://en.wikipedia.org/wiki/Endomorphism) of a [vector space](https://en.wikipedia.org/wiki/Vector_space "Vector space") are its [projections](https://en.wikipedia.org/wiki/Projection_(linear_algebra) "Fixed point (mathematics)"). --- Date: 20210518 Links to: References: * [Wikipedia](https://en.wikipedia.org/wiki/Idempotence)