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Results tagged with ct.category-theory
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user 328767
Enriched categories, topoi, abelian categories, monoidal categories, homological algebra.
2
votes
0
answers
115
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About condition for structure sheaf of a scheme being compact object in a category of sheaf ... [duplicate]
I found the condition for one direction :
Categorical interpretation of quasi-compact quasi-separated schemes
This article said that if $X$ is quasi compact and quasi separated, $\mathscr{O}_X$ is a c …
- 121
2
votes
0
answers
185
views
Relation between push forward by diagonal morphism and higher direct image functors
Let $f : X \to Y$ be a morphism between two Noetherian schemes. Then $f_*$(respect to $R^1f_*$) sends coherent sheaves to coherent sheaves if and only if $f$ is universally closed (respect to separat …
- 121