Let $R$ be a commutative ring considered as one obejct category. What is the precise relationship between flat functors in $[R^{op}, $ Ab] and flat modules?Here, by flat functors I understand those being directed colimits of representables. If these are equivalent, how is it proved?
2026-03-25 19:00:57.1774465257
Flat functors, flat modules, presheave category
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