Searching for absolute CR-epic spaces

Abstract

In previous papers, [Barr, Burgess, & Raphael (2003), Barr, Raphael, & Woods (to appear)], two of us have investigated the situation of a topological space Y and a subspace X such that the induced map C(Y ) // C(X) is an epimorphism in the category CR of commutative rings (with units). We call such an embedding a CR -epic embedding and we say that X is… (More)

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