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- W2594488539 abstract "The total right ring of quotients Q tot r ( R ) , sometimes also called the maximal flat epimorphic right ring of quotients or right flat epimorphic hull, is usually obtained as a directed union of a certain family of extension of the base ring R . In [K. Morita, Flat modules, injective modules and quotient rings, Math. Z. 120 (1971) 25–40], Q tot r ( R ) is constructed in a different way, by transfinite induction on ordinals. Starting with the maximal right ring of quotients Q max r ( R ) , its subrings are constructed until Q tot r ( R ) is obtained. Here, we prove that Morita's construction of Q tot r ( R ) can be simplified for rings satisfying condition (C) that every subring of the maximal right ring of quotients Q max r ( R ) containing R is flat as a left R -module. We illustrate the usefulness of this simplification by considering the class of right semihereditary rings all of which satisfy condition (C). We prove that the construction stops after just one step and we obtain a simple description of Q tot r ( R ) in this case. Lastly, we study conditions that imply that Morita's construction ends in countably many steps." @default.
- W2594488539 created "2017-03-16" @default.
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- W2594488539 date "2006-10-01" @default.
- W2594488539 modified "2023-10-14" @default.
- W2594488539 title "A simplification of Morita's construction of total right rings of quotients for a class of rings" @default.
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- W2594488539 doi "https://doi.org/10.1016/j.jalgebra.2006.07.007" @default.
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