Phantom covering ideals in categories without enough projective morphisms

Sergio Estrada, Pedro A. Guil Asensio, Sinem Odabasi

We give sufficient conditions to ensure that the ideal $\Phi (\mathcal{E})$ of $\mathcal{E}$-phantom maps in a locally $\lambda$-presentable exact category $(\mathcal{A},\mathcal{E})$ is (spe…