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We show that certain divisors of Brill-Noether and Gieseker-Petri type spanextremal rays of the effective cone in the moduli space of stable genus onecurves with $n$ ordered marked points. In particular, they are different fromthe infinitely many extremal rays found in \cite{ChenCoskun}.

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