# surjection

A mapping (function) that is ‘onto,’, i.e., in which every element of its codomain has some element of its domain mapped to it. See the function article for a complete exposition.

- [MLA] “surjection.”
*Platonic Realms Interactive Mathematics Encyclopedia.*Platonic Realms, 8 Mar 2013. Web. 8 Mar 2013. <http://platonicrealms.com/> - [APA] surjection (8 Mar 2013). Retrieved 8 Mar 2013 from the
*Platonic Realms Interactive Mathematics Encyclopedia:*http://platonicrealms.com/encyclopedia/surjection/