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Results tagged with ag.algebraic-geometry
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user 510242
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
7
votes
0
answers
270
views
Complete curves in $\mathcal{M}_g$ all of whose Jacobians have trivial endomorpism ring
I'm trying to construct complete smooth curves $C$ in $\overline{M}_g$ such that for all points $S \in C \cap \mathcal{M}_g$, its Jacobian $\text{Jac}(S)$ satisfies $\text{End}(\text{Jac}(S)) = \mathb …
- 131
3
votes
2
answers
221
views
Reductive groups over arbitrary fields with disconnected relative root systems
Let $\mathbf{G}$ be a connected reductive group over a field $k$, not necessarily algebraically closed. Let $\Phi$ be the relative root system for $\mathbf{G}$ with respect to $k$, and assume that $\ …
- 131
3
votes
Reductive groups over arbitrary fields with disconnected relative root systems
After looking through the reference that Mikhail Borovoi gave me and tracing through a bunch of back-references, I found a fairly clear description of what holds in the following survey of Tits:
Tits, …
- 131