nLab
projective cover

Contents

Definition

For N𝒜N \in \mathcal{A} an object, a projective cover is a morphism N˜N\tilde N \to N out of a projective object which is a superfluous epimorphism.

References

  • 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

Revised on September 25, 2012 01:13:20 by Urs Schreiber (82.169.65.155)