--phantom and --cophantom morphisms
M Khattari, D Bennis - International Electronic Journal of Algebra, 2023 - dergipark.org.tr
… RD-phantom and RD-Ext-phantom morphisms. In our case it is an open question: Does
every left module M have an XR-∆(n,d)-projective (resp., an RX-∇(n,d)injective) precover (resp., …
every left module M have an XR-∆(n,d)-projective (resp., an RX-∇(n,d)injective) precover (resp., …