Full Idea
An 'ordered pair' (or ordered n-tuple) is a set with its members in a particular order.
Gist of Idea
An 'ordered pair' (or ordered n-tuple) is a set with its members in a particular order
Source
Graham Priest (Intro to Non-Classical Logic (1st ed) [2001], 0.1.10)
Book Reference
Priest,Graham: 'Introduction to Non-Classical Logic' [CUP 2001], p.-6