Functors Main article: functor Functors are structure-preserving maps between categories. They can be thought of as morphisms in the category of al...

P. Freyd [1] ) if it contains all the objects of C . A lluf subcategory is typically not full: the only full lluf subcategory of a category is that...

As mentioned above, the category of all abelian groups is an abelian category. The category of all finitely generated abelian groups is also an abe...