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Results tagged with ag.algebraic-geometry
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user 111804
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
5
votes
What do non-principal divisors in a Picard group look like
Here's the combinatorial picture which might be useful to your understanding.
Think of a Riemann surface as a graph. The genus of a Riemann surface is the minimal number of circles you need to cut ou …
- 376
2
votes
On the notion of sub-hyperfield
There are two possible notions for a sub-hyperring that make sense:
A subset $S$ containing zero and such that for any $x, y\in S$, $x + y \in S$ and $xy \subseteq S$.
A subset $S$ such that with th …
- 376