Lipschitz Geometry of Real Semialgebraic Surfaces

Lev Birbrair and Andrei Gabrielov ()
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Lev Birbrair: Universidade Federal do Ceará (UFC), Departamento de Matemática
Andrei Gabrielov: Purdue University, Department of Mathematics

Chapter Chapter 8 in Handbook of Geometry and Topology of Singularities IV, 2023, pp 449-462 from Springer

Abstract: Abstract We present here basic results in Lipschitz Geometry of semialgebraic surfaceSemialgebraic surface germs. Although bi-Lipschitz classification problem of surface germs with respect to the inner metric was solved long ago, classification with respect to the outer metric remains an open problem. We review recent results related to the outer and ambient bi-Lipschitz classification of surface germs. In particular, we explain why the outer bi-Lipschitz classification is much harder than the inner classification, and why the ambient Lipschitz GeometryLipschitzGeometry of surface germs is very different from their outer Lipschitz Geometry. In particular, we show that the ambient Lipschitz Geometry of surface germs includes all of the Knot Theory.

Date: 2023
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DOI: 10.1007/978-3-031-31925-9_8

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