Oxford Topology Seminar
The basic theme of this talk is the extrinsic description of objects by means of morphisms. One way to do this is to say that all monomorphisms from the object are “special” in some way; the dual of this is to single out epimorphisms to the object.
Bankston, Paul, "When Semi-Monotone Implies Monotone" (2014). Mathematics, Statistics and Computer Science Faculty Research and Publications. 219.