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Enriques Diagrams and Adjacency of Planar Curve Singularities

  Published:2005-02-01
 Printed: Feb 2005
  • Maria Alberich-Carramiñana
  • Joaquim Roé
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Abstract

We study adjacency of equisingularity types of planar complex curve singularities in terms of their Enriques diagrams. The goal is, given two equisingularity types, to determine whether one of them is adjacent to the other. For linear adjacency a complete answer is obtained, whereas for arbitrary (analytic) adjacency a necessary condition and a sufficient condition are proved. We also obtain new examples of exceptional deformations, {\em i.e.,} singular curves of type $\mathcal{D}'$ that can be deformed to a curve of type $\mathcal{D}$ without $\mathcal{D}'$ being adjacent to $\mathcal{D}$.
MSC Classifications: 14B07, 32S30 show english descriptions Deformations of singularities [See also 14D15, 32S30]
Deformations of singularities; vanishing cycles [See also 14B07]
14B07 - Deformations of singularities [See also 14D15, 32S30]
32S30 - Deformations of singularities; vanishing cycles [See also 14B07]
 

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