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Results tagged with ag.algebraic-geometry
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user 38585
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
0
votes
1
answer
147
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operatiing quasi-coherator functor on a product of modules
Let $R$ be a commutative ring and $\{M_i\}_{i\in I}$ be a family of $R$-modules. We know that there are functors $^\widetilde{\ }: R{\rm -Mod}\to {\rm Qco(Spec}R)$ and $\Gamma({\rm Spec}R, -): {\rm …
- 141
2
votes
0
answers
287
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Flat and injective quasi-coherent sheaves
Let $X$ be a quasi-compact semi-separated scheme and
$$\varepsilon: 0\to A \to B \to C \to 0$$
be a short exact sequence of quasi-coherent sheaves. $\varepsilon$ is called a (categorical) pure exact …
- 141