Functorial factorization, well-pointedness, and separability

George Janelidze – 25 February 1998

This is joint work with W.Tholen, to appear in JPAA. Abstract: A functorial treatment of factorization structures is presented, under extensive use of well-pointed endofunctors. Actually, so-called weak factorization systems are interpreted as pointed lax indexed endofunctors, and this sheds new light on the correspondence between reflective subcategories and factorization systems. The second part of the paper presents two important factorization structures in the context of pointed endofunctors: concordant-dissonant and separable-inseparable.