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Results tagged with ag.algebraic-geometry
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user 121069
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
3
votes
0
answers
149
views
Is this scheme an ind-variety?
Let $K_1\subset K_2\subset \ldots$ be a tower of number fields, with $K_n$ of degree $2^n$.
Let $$X := \sqcup_{n=1}^\infty Spec \ K_n$$
This is a $\mathbb{Q}$-scheme. The structure morphism is loc …
- 283
18
votes
3
answers
788
views
If a variety $X$ has finite automorphism group, is the same true for its $n$-fold self-produ...
Let $X$ be an algebraic variety over $\mathbb{C}$.
Let $n\geq 1$ be an integer and let $X^n$ be the $n$-fold self product of $X$.
Q. Is there an integer $n\geq 1$ and an algebraic variety $X$ …
- 283
7
votes
3
answers
439
views
When do automorphisms on open subsets extend
Let $X$ be a normal affine variety of dimension at least two over $\mathbb{C}$ and let $U\subset X$ be a dense open. Assume that $\mathrm{codim}(X\setminus U) \geq 2$.
I think Hartog's lemma implies …
- 283