Extremal contractions from 4-dimensional manifolds to 3-folds
| dc.creator | Kachi, Yasuyuki | |
| dc.date | 1995-02-25 | |
| dc.date.accessioned | 2026-07-07T09:06:23Z | |
| dc.date.available | 2026-07-07T09:06:23Z | |
| dc.description | Let $g : X \to Y$ be the contraction of an extremal ray of a smooth projective 4-fold $X$ such that $\dim Y=3$. Then $g$ may have a finite number of 2-dimensional fibers. We shall classify those fibers. Especially we shall prove that any two points of such a fiber is joined by a chain of rational curves of length at most 2 with respect to $-K_X$, and that $|-K_X|$ is $g\text{-free}$. | |
| dc.description | 65 pages, TeX dialect: amsppt | |
| dc.identifier | https://arxiv.org/abs/alg-geom/9502023 | |
| dc.identifier | http://arxiv.org/abs/alg-geom/9502023 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/149987 | |
| dc.subject | Algebraic Geometry | |
| dc.title | Extremal contractions from 4-dimensional manifolds to 3-folds | |
| dc.type | text |