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Results tagged with ct.category-theory
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user 286155
Enriched categories, topoi, abelian categories, monoidal categories, homological algebra.
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A Galois connection arising from discussion concerning flat module and pure exact sequence
There is some sort of symmetry in the definition of flat module and pure short exact sequence which can be made precise as follows.
Let $R$ be a ring (with unit), $\mathcal{R}$ be the class of all rig …
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