Left derived functors are zero on all projective objects. One may also start with a contravariant left-exact functor F ;...
Diagonal functor : The diagonal functor is defined as the functor from D to the functor category D C which sends each ob...
Yoneda's lemma asserts that every natural transformation between Hom functors is of this form. In other words, the Hom f...
Preservation of limits Representable functors are naturally isomorphic to Hom functors and therefore share their propert...
Problems formulated with adjoint functors 1.3 Adjoint functors as solving optimization problems 1.4 The case of partial ...
C ) can be made precise in several ways; the most succinct formulation uses the language of adjoint functors . Every fun...
Ext functor - Wikipedia, the free encyclopedia Ext functor From Wikipedia, the free encyclopedia Jump to: navigation , s...
