For an object, a projective cover is a morphism out of a projective object which is a superfluous epimorphism.
projective object, projective presentation, projective cover, projective resolution
injective object, injective presentation, injective envelope, injective resolution
flat object, flat resolution
U. Shukla, On the projective cover of a module and related results, Pacific J. Math. Volume 12, Number 2 (1962), 709-717 (Euclid)
Wikipedia, Projective cover
Last revised on September 25, 2012 at 01:13:20. See the history of this page for a list of all contributions to it.