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This tag is used if a reference is needed in a paper or textbook on a specific result.

1 vote
1 answer
179 views

Characterization of $d$-gonal curves on a K3 surface

Let $X$ be a K3 surface and $C$ a curve on $X$. We say that $C$ is $d$-gonal if it admits a pencil of degree $d$ (and none of smaller degree). I am wondering if there exist characterizations of $d$- …
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  • 761
5 votes
2 answers
464 views

Reference for Automorphisms of K3 surfaces

I am looking for some introductory reference concerning Automorphisms (of finite order) on K3 surfaces. Any suggestion?
Heitor's user avatar
  • 761
4 votes
2 answers
2k views

Topology of the blowup of a surface at a point (connected sum)

Let $S$ be a complex algebraic (smooth) surface and $\widetilde{S}$ be the blowup of $S$ at a point $p\in S$. I would like to understand the statement: As a topological manifold, $\widetilde{S}$ …
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  • 761