Category (disambiguation): Difference between revisions
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Latest revision as of 05:01, 26 September 2013
This disambiguation page lists articles associated with the same or a similar title.
- Category (philosophy): Add brief definition or description
Category theory: Loosely speaking, a class of objects and a collection of morphisms which act upon them; the morphisms can be composed, the composition is associative and there are identity objects and rules of identity. [e]
- First category space: A topological space which is a countable union of nowhere dense subsets; a meagre space. [e]
- Second category space: A topological space which is not the countable union of nowhere dense subsets; a space which is not of first category. [e]