On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface

Details On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface

1997-02-15

arxiv.org/abs/alg-geom/9702011v1

J. Math. Sci. (New York), 95(1): 1986--1995, 1999

Mathematics

Algebraic Geometry

LaTeX2e

Scientific paper

In this paper we study a local structure of extrmal contractions $f\colon
X\to S$ from threffolds $X$ with only terminal singularities onto a surface
$S$. If the surface $S$ is non-singular and $X$ has a unique non-Gorenstein
point on a fiber we prove that either the linear system $|-K_X|$, $|-2K_X|$ or
$|-3K_X|$ contains a "good" divisor.

Affiliated with

Also associated with

No associations

Rating

On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On extremal contractions from threefolds to surfaces: the case of one non-Gorenstein point and non-singular base surface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-629582