The meanings of different arrows are not entirely standardized: the arrows used for monomorphisms, epimorphisms, and isomorphisms are also used for injections, surjections, and bijections, as well as the cofibrations, fibrations, and weak equivalences in a model category.
The meanings of different arrows are not entirely standardized the arrows used for monomorphisms epimorphisms and isomorphisms are also used for injections surjections and bijections as well as the cofibrations fibrations and weak equivalences in a model category