Mathematicians sometimes use the word **collection** to denote a bunch of “things” without prejudice as to whether those things form a set, a proper class, or some other formal notion of collection such as a type. For example, the word is often used this way in the definition of a category.

Last revised on December 13, 2009 at 07:27:39. See the history of this page for a list of all contributions to it.