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arXiv · 0805.4083

On the equi-normalizable deformations of singularities of complex plane curves

Dmitry Kerner
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Abstract

We study a specific class of deformations of curve singularities: the case when the singular point splits to several ones, such that the total $δ$ invariant is preserved. These are also known as equi-normalizable or equi-generic deformations. We restrict primarily to the deformations of singularities with smooth branches. A natural invariant of the singular type is introduced: the dual graph. It imposes severe restrictions on the possible collisions/deformations. And allows to prove some bounds on the variation of classical invariants in equi-normalizable families. We consider in details deformations of ordinary multiple points, the deformations of a singularity into the collections of ordinary multiple points and deformations of the type $x^p+y^{pk}$ into the collections of $A_k$'s.

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Dmitry Kerner. 2009-04-21. On the equi-normalizable deformations of singularities of complex plane curves. https://arxiv.org/abs/0805.4083

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