classes/categories Category of being Categories (Aristotle) Category (Kant) Categories (Peirce) Category (Vaisheshika) Stoic categories Category mistake...

specifically in category theory, the category of small categories, denoted by Cat, is the category whose objects are all small categories and whose morphisms...

In algebra, given a ring R, the category of left modules over R is the category whose objects are all left modules over R and whose morphisms are all...

the intensities of tropical depressions and tropical storms—into five categories distinguished by the intensities of their sustained winds. This measuring...

A category mistake (or category error, categorical mistake, or mistake of category), is a semantic or ontological error in which things belonging to a...

The pregnancy category of a medication is an assessment of the risk of fetal injury due to the pharmaceutical, if it is used as directed by the mother...

prototypical example of an abelian category is the category of abelian groups, Ab. Abelian categories are very stable categories; for example they are regular...

In mathematics, higher category theory is the part of category theory at a higher order, which means that some equalities are replaced by explicit arrows...

In mathematics, a category (sometimes called an abstract category to distinguish it from a concrete category) is a collection of "objects" that are linked...

many categories in mathematics, the category of rings is large, meaning that the class of all rings is proper. The category Ring is a concrete category meaning...