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In this paper, projective modules over a quantale are characterized by distributivity, continuity, and adjointness conditions. It is then shown that a morphism Q --> A of commutative quantales is coexponentiable if and only if the corresponding Q-module is projective, and hence, satisfies these equivalent conditions.
@article{TAC_2016_31_a29, author = {Susan Niefield}, title = {Projectivity, continuity and adjointness: quantales, {Q-posets} and { Q-modules}}, journal = {Theory and applications of categories}, pages = {839--851}, publisher = {mathdoc}, volume = {31}, year = {2016}, language = {en}, url = {http://geodesic.mathdoc.fr/item/TAC_2016_31_a29/} }
Susan Niefield. Projectivity, continuity and adjointness: quantales, Q-posets and Q-modules. Theory and applications of categories, Tome 31 (2016), pp. 839-851. http://geodesic.mathdoc.fr/item/TAC_2016_31_a29/