Additive Categories #
This file contains the definition of additive categories.
TODO: show that finite biproducts implies enriched over commutative monoids and what is missing additionally to have additivity is that identities have additive inverses, see https://ncatlab.org/nlab/show/biproduct#BiproductsImplyEnrichment
- to_preadditive : category_theory.preadditive C
- to_has_finite_biproducts : category_theory.limits.has_finite_biproducts C
A preadditive category
C is called additive if it has all finite biproducts.