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arXiv · 0809.1699

Exceptional Loci on $\bar M_{0,n}$ and Hypergraph Curves

Ana-Maria Castravet·Jenia Tevelev
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Abstract

We give a myriad of examples of extremal divisors, rigid curves, and birational morphisms with unexpected properties for the Grothendieck--Knudsen moduli space $\bar M_{0,n}$ of stable rational curves. The basic tool is an isomorphism between $M_{0,n}$ and the Brill--Noether locus of a very special reducible curve corresponding to a hypergraph.

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BibTeXRIS

Ana-Maria Castravet, Jenia Tevelev. 2008-09-10. Exceptional Loci on $\bar M_{0,n}$ and Hypergraph Curves. https://arxiv.org/abs/0809.1699

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