Contractible Extremal Rays on \overline{M}_{0,n}
| dc.creator | Keel, Sean | |
| dc.creator | McKernan, James | |
| dc.date | 1996-07-07 | |
| dc.date.accessioned | 2026-07-07T09:06:52Z | |
| dc.date.available | 2026-07-07T09:06:52Z | |
| dc.description | We consider the cones of curves and divisors on the moduli space of stable pointed rational curves,M_n, and on the quotient by the symmetric group, Q_n, which is a moduli space of pairs. We find generators for contractible extremal rays of the cone of curves NE_1(M_n), and for the cone of divisors NE^1(Q_n). This second cone turns out to be simplicial. We give complete descriptions of NE_1(M_n) and NE_1(Q_n) for small n (< 8 in the first case, < 11 in the second). We also have results of independent interest on when curves in a divisor generate the cone of curves of the ambient variety. | |
| dc.description | 16 pages,AMSTex | |
| dc.identifier | https://arxiv.org/abs/alg-geom/9607009 | |
| dc.identifier | http://arxiv.org/abs/alg-geom/9607009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/150169 | |
| dc.subject | Algebraic Geometry | |
| dc.title | Contractible Extremal Rays on \overline{M}_{0,n} | |
| dc.type | text |