# Monoid

### From HaskellWiki

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+ | * An introduction: [http://sigfpe.blogspot.com/2009/01/haskell-monoids-and-their-uses.html Haskell Monoids and their Uses]: | ||

* [http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Monoid.html The Data.Monoid module] | * [http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Monoid.html The Data.Monoid module] | ||

* The blog article [http://apfelmus.nfshost.com/monoid-fingertree.html Monoids and Finger Trees] | * The blog article [http://apfelmus.nfshost.com/monoid-fingertree.html Monoids and Finger Trees] | ||

* [[Category theory]] | * [[Category theory]] | ||

* [http://www.cs.ru.nl/~heunen/publications/2006/arrows/arrows.pdf Arrows, like Monads, are Monoids] (PDF) | * [http://www.cs.ru.nl/~heunen/publications/2006/arrows/arrows.pdf Arrows, like Monads, are Monoids] (PDF) |

## Revision as of 14:43, 21 January 2009

*This article is a stub. You can help by expanding it.*

A monoid is an algebraic structure with a single, associative binary operation and an identity element.

## See also

- An introduction: Haskell Monoids and their Uses:
- The Data.Monoid module
- The blog article Monoids and Finger Trees
- Category theory
- Arrows, like Monads, are Monoids (PDF)