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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