Equisingularity classes of birational projections of normal singularities to a plane

Details Equisingularity classes of birational projections of normal singularities to a plane Equisingularity classes of birational projections of normal singularities to a plane

2007-07-10

arxiv.org/abs/0707.1387v1

Mathematics

Algebraic Geometry

22 pages, 3 figures. To appear in Advances in Mathematics

Scientific paper

Given a birational normal extension S of a two-dimensional local regular ring R, we describe all the equisingularity types of the complete ideals J in R whose blowing-up has some point at which the local ring is analytically isomorphic to S. The problem of classifying the germs of such normal surface singularities was already posed by Spivakovsky (Ann. of Math. 1990). This problem has two parts: discrete and continous. The continous part is to some extent equivalent to the problem of the moduli of plane curve singularities, while the main result of this paper solves completely the discrete part.

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