Geodesic
Products in categories of fractions and universal inversion of homomorphisms
Sbornik. Mathematics, Tome 188 (1997) no. 10, pp. 1521-1541

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Main result. If finite direct products exist in a category and the class of morphisms $\Sigma$ is such that the category of fractions $[\Sigma ^{-1}]$ and the canonical functor $\mathfrak K\to [\Sigma ^{-1}]$ preserves these products. Using this theorem analogues of the theory of matrix localization of rings are constructed for arbitrary varieties of universal algebras and for preadditive categories. 
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     author = {S. N. Tronin},
     title = {Products in categories of fractions and universal inversion of homomorphisms},
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     url = {http://geodesic.mathdoc.fr/item/SM_1997_188_10_a4/}
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S. N. Tronin. Products in categories of fractions and universal inversion of homomorphisms. Sbornik. Mathematics, Tome 188 (1997) no. 10, pp. 1521-1541. http://geodesic.mathdoc.fr/item/SM_1997_188_10_a4/