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arxiv: 1407.4877 · v1 · pith:UAJUCJN7new · submitted 2014-07-18 · 🧮 math.AG

Extremal effective divisors of Brill-Noether and Gieseker-Petri type in overline{mathcal M}_(1,n)

classification 🧮 math.AG
keywords extremalbrill-noetherdivisorseffectivegieseker-petriraystypecertain
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We show that certain divisors of Brill-Noether and Gieseker-Petri type span extremal rays of the effective cone in the moduli space of stable genus one curves with $n$ ordered marked points. In particular, they are different from the infinitely many extremal rays found in \cite{ChenCoskun}.

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