✦ LIBER ✦

Automorphism Groups for Quasi-homogeneous Gorenstein Surface Singularities

✍ Scribed by Frieda M Ganter

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 142 KB
Volume: 202
Category: Article
ISSN: 0021-8693
DOI: 10.1006/jabr.1997.7294

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✦ Synopsis

Let X, 0 be a non᎐log-canonical, quasi-homogeneous surface singularity germ. Ž . And let G ; Aut X, 0 be the maximal reductive subgroup. In this paper we bound the order of GrC U by yP и P, a purely topological invariant. Hurwitz's theorem comes out as a corollary. We use the standard approach of taking the quotient Ž . space of X, 0 by the action of a finite group of automorphisms acting freely on Ä 4 X y 0 .