Category: Category and Functor

1. Covariant Functor 2. Contravariant Functor

1. Isomorphism between objects 2. Goupoïdes

 Extract from : CRing Project, Chapter 0 source : https://math.berkeley.edu/~amathew/chcategories.pdf 1. Category definition 2. Examples and notations

Category 1.Table of Content2.Definition of Category3.Isomorphisme, groupoïde Functor 4.Covariant Functor 5.Contravariant Functor

Category 1.Table of Content2.Definition of Category3.Isomorphisme, groupoïde Functor 4.Covariant Functor  

1.Table of Content 2.Definition of Category 3.Isomorphisme, groupoïde

 Category 1.Table of Content2.Definition of Category3.Isomorphisme, groupoïde Functor 4.Covariant Functor