On Extremal Contractions from Threefolds to Surfaces: the Case of One non-Gorenstein Point

Yuri G. Prokhorov

On Extremal Contractions from Threefolds to Surfaces: the Case of One non-Gorenstein Point

alg-geom 2010-05-12 v2 Algebraic Geometry

Authors: Yuri G. Prokhorov

Abstract

Let $f\colon X\to S$ be an extremal contraction from a threefold with only terminal singularities to a surface. We study local analytic structure such contractions near degenerate fiber $C$ in the case when $C$ is irreducible and $X$ has on $C$ only one non-Gorenstein point.

Keywords

extremal contraction threefold surface terminal singularities non-Gorenstein point

Cite

@article{arxiv.alg-geom/9605002,
  title  = {On Extremal Contractions from Threefolds to Surfaces: the Case of One non-Gorenstein Point},
  author = {Yuri G. Prokhorov},
  journal= {arXiv preprint arXiv:alg-geom/9605002},
  year   = {2010}
}

Comments

LaTeX2e, to appear in Contemporary Math. AMS

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