This category is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics articles
No categories contain themselves; they're not allowed to. BTW, this page has one of the most ridiculous names in all Wikipedia. —Keenan Pepper 16:16, 5 June 2006 (UTC)[reply]
Is there a category (in the sense of category theory) that contains a category in the non-categorical sense as an object? I don't think there is one, at least inside mathematics. -- Taku (talk)