The extremal-ray conjecture for cyclic divisors on M‾0,n\overline{M}_{0,n}M0,n
Let m≥5m\geq 5m≥5 be prime, let m∣nm\mid nm∣n, and let d1=⋯=dnd_1=\cdots=d_nd1=⋯=dn. For the associated Zm\mathbb{Z}_mZm-tuple, let D(Zm,Em;d⃗)\mathfrak{D}(\mathbb{Z}_m,E_m;\vec d)D(Zm,Em;d) be the divisor defined in equa…