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Results tagged with sheaf-theory
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user 70593
For questions about sheaves on a topological space.
2
votes
0
answers
221
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Surjectivity locus of a morphism of families of sheaves
Let $X$ and $T$ be schemes and assume we have two coherent sheaves $\mathcal{F}$ and $\mathcal{G}$ on $X\times T$ which are flat over $T$, that is these are families of sheaves parametrized by $T$.
…
- 1,025
3
votes
0
answers
327
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Which sheaves on a projective bundle are flat over the base scheme?
Assume $X$ is a noetherian scheme over $\mathbb{C}$ and $E$ a locally free sheaf of finite rank on $X$. Denote the the associated projective bundle by $f: \mathbb{P}(E)\rightarrow X$.
Are there any c …
- 1,025
2
votes
2
answers
598
views
Canonical (tautological) section of a family of sheaves
A couple of months ago, i saw a construction, that somehow looks like the construction of the tautological section of the pullback of a vector bundle to its total space, i am trying to piece it togeth …
- 1,025