This note covers the following topics: Reflections , Adjoint functors ,
Chain complexes, Homology , Homological algebra, First approximation to derived
functors, Bar resolutions and the classical theory of derived functors, Double
complexes, Long exact sequences, Diagrammatics , The third fundamental lemma,
Generators and cogenerators.

**Author(s):** Mariusz
Wodzicki

47**Pages**