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Results tagged with ag.algebraic-geometry
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user 121225
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
4
votes
Accepted
Etale map has image whose complement is the vanishing locus of a finitely generated ideal
Let $U$ be the image of $\operatorname{Spec} B$ in $\operatorname{Spec} A$. Since the map $\operatorname{Spec} B \to \operatorname{Spec} A$ is open, $U$ is open. And since $\operatorname{Spec} B$ is q …
- 374
8
votes
2
answers
671
views
Is this lattice in the Tate module of an elliptic curve, coming from complex-analytic unifor...
Let $E$ be an elliptic curve over $\mathbb{Q}$, and let $p$ and $\ell$ be two distinct primes of good reduction. Let $T_\ell = T_\ell(E) = \varprojlim E[\ell^n](\overline{\mathbb{Q}})$ be the $\ell$-a …
- 374
2
votes
0
answers
111
views
How to compute explicit equations for the Jacobian of a variety over a field [duplicate]
Suppose we start with a projective curve $X$ over a field $K$, given as a closed subvariety of $\mathbb P^n_K$ by some explicit list of equations. I would like to find an explicit representation of th …
- 374