Equisingularity at the Normalisation

Details Equisingularity at the Normalisation Equisingularity at the Normalisation

2006-12-07

arxiv.org/abs/math/0612201v1

Mathematics

Algebraic Geometry

26 pages, 2 figures

Scientific paper

We look at topological equisingularity of a holomorphic family of reduced mapping germs f_t:(C^3,O)->C over a contractible base T having non-isolated singularities, by means of their normalisations. We introduce the notion of Equisingularity at the Normalisation for a family f_t and prove that, in many cases, it characterises topological embedded equisingularity and $R$-equisingularity. Moreover we apply our results to the study of topological A-equisingularity of parametrised surfaces, and in many cases characterise it in terms of the constancy of the Milnor number of the inverse image of the singular sets of the parametrised surfaces. A novelty of our approach is that our topological trivialisations are global in the base.

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