Tilting preenvelopes and cotilting precovers in general Abelian categories

Carlos E. Parra, Manuel Saorín, Simone Virili

We consider an arbitrary Abelian category $\mathcal{A}$ and a subcategory $\mathcal{T}$ closed under extensions and direct summands, and characterize those $\mathcal{T}$ that are (…