Preadditive category

A **preadditive category** is a type of category in the field of category theory that has structures resembling abelian groups in its hom-sets. Specifically, a preadditive category satisfies the following properties: 1. **Hom-sets as Abelian Groups**: For any two objects \(A\) and \(B\) in the category, the set of morphisms \(\text{Hom}(A, B)\) forms an abelian group.