Abstract
LetTbe a Grothendieck topology, Ab the category of abelian groups, and. the category of Ab-valued sheaves onT.It is known that is an abelianA B5category with a set of generators [2, Theorem 1.6(i), p. 30] and, hence, has injective envelopes [10, Theorem 3.2, p. 89]. Consider an objectFof.
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