Equisingular and Equinormalizable Deformations of Isolated Non-Normal Singularities

2017/02/17 by Greuel, Gert-Martin
#14 #14B05 #14B07 #32 #32S15 #58K10 #Algebraic Geometry (math.AG) #FOS: Mathematics

paper · doi:10.48550/arxiv.1702.05505

Abstract

We present new results on equisingularity and equinormalizability of families with isolated non-normal singularities (INNS) of arbitrary dimension. We define a δ-invariant and a μ-invariant for an INNS and prove necessary and sufficient numerical conditions for equinormalizability and weak equinormalizability using δ and μ. Moreover, we determine the number of connected components of the Milnor fibre of an arbitrary INNS. For families of generically reduced curves, we investigate the topological behavior of the Milnor fibre and characterize topological triviality of such families. Finally we state some open problems and conjectures. In addition we give a survey of classical results about equisingularity and equinormalizability so that the article may be useful as a reference source.

Related

• Equinormalizability and topologically triviality of deformations of isolated curve singularities over smooth base spaces
• Equinormalizable theory for plane curve singularities with embedded\n points and the theory of equisingularity
• Geometry of non-degenerate locally tame non-isolated singularities
• Equisingularity at the Normalisation
• Equisingularity of families of hypersurfaces and applications to mappings