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Related papers: Lipschitz geometry of complex curves

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We investigate the relationships between the Lipschitz outer geometry and the embedded topological type of a hypersurface germ in $(\mathbb C^n,0)$. It is well known that the Lipschitz outer geometry of a complex plane curve germ determines…

Algebraic Geometry · Mathematics 2015-11-26 Walter D. Neumann , Anne Pichon

The aim of this paper to introduce the reader to a recent point of view on the Lipschitz classifications of complex singularities. It presents the complete classification of Lipschitz geometry of complex plane curves singularities and in…

Algebraic Geometry · Mathematics 2020-07-09 Anne Pichon

We study the ambient Lipschitz geometry of semialgebraic surfaces. It was discovered in \cite{BBG} that ambient Lipschitz Geometry is different from the outer Lipschtz geometry. We show that two surface germs in $\mathbb{R}^3$, Lipschitz…

Metric Geometry · Mathematics 2024-12-02 Lev Birbrair , Davi Lopes Medeiros

We present here basic results in Lipschitz Geometry of semialgebraic 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 Geometry · Mathematics 2022-12-13 Lev Birbrair , Andrei Gabrielov

We prove that the outer Lipschitz geometry of a germ $(X,0)$ of a normal complex surface singularity determines a large amount of its analytic structure. In particular, it follows that any analytic family of normal surface singularities…

Algebraic Geometry · Mathematics 2016-02-18 Walter D. Neumann , Anne Pichon

The main result of the paper states that a connected complex affine algebraic curve is Lipschitz normally embedded (shortened to LNE afterwards) in $\mathbb{C}^n$ if and only if its germ at any singular point is a finite union of…

Algebraic Geometry · Mathematics 2023-11-28 André Costa , Vincent Grandjean , Maria Michalska

We undertake a systematic study of Lipschitz Normally Embedded normal complex surface germs. We prove in particular that the topological type of such a germ determines the combinatorics of its minimal resolution which factors through the…

Algebraic Geometry · Mathematics 2022-06-01 André Belotto da Silva , Lorenzo Fantini , Anne Pichon

We present a complete classification of complex plane algebraic curves, equipped with the induced Euclidean, up to global bilipschitz homeomorphism.

Algebraic Geometry · Mathematics 2020-03-17 Renato Targino

We give conditions for topological and bi-Lipschitz equivalences within a class of mixed singularities of Pham-Brieskorn type. As a consequence, we construct infinite families that are topologically trivial but have distinct bi-Lipschitz…

Algebraic Geometry · Mathematics 2026-05-05 Inácio Rabelo

We study outer Lipschitz geometry of real semialgebraic or, more general, definable in a polynomially bounded o-minimal structure over the reals, surface germs. In particular, any definable H\"older triangle is either Lipschitz normally…

Metric Geometry · Mathematics 2021-08-30 Andrei Gabrielov , Emanoel Souza

In the paper \cite{renato} Renato Targino shows that bi-Lipschitz type of plane curve is determined by the local ambient topological properties of curves. Here we show that it is not longer true in higher dimensions. However we show that…

Algebraic Geometry · Mathematics 2023-01-31 Alexandre Fernandes , Zbigniew Jelonek

The local Lipschitz property is shown for the graph avoiding multiple point intersection with lines directed in a given cone. The assumption is much stronger than those of Marstrand's well-known theorem, but the conclusion is much stronger…

Analysis of PDEs · Mathematics 2022-10-04 Dimitris Vardakis , Alexander Volberg

Any subanalytic germ $(X,0) \subset (\mathbb R^n,0)$ is equipped with two natural metrics: its outer metric, induced by the standard Euclidean metric of the ambient space, and its inner metric, which is defined by measuring the shortest…

Algebraic Geometry · Mathematics 2025-01-07 Lorenzo Fantini , Anne Pichon

We consider a special case of the outer bi-Lipschitz classification of real semialgebraic (or, more general, definable in a polynomially bounded o-minimal structure) surface germs, obtained as a union of two normally embedded H\"older…

Metric Geometry · Mathematics 2022-07-21 Lev Birbrair , Andrei Gabrielov

In this paper, we prove that two normal complex surface germs that are inner bilipschitz--but not necessarily orientation-preserving--homeomorphic, have in fact the same oriented topological type and the same minimal plumbing graph. Along…

Algebraic Geometry · Mathematics 2025-11-10 Lorenzo Fantini , Anne Pichon

We determine the local geometric structure of two-dimensional metric spaces with curvature bounded above as the union of finitely many properly embedded/branched immersed Lipschitz disks. As a result, we obtain a graph structure of the…

Metric Geometry · Mathematics 2024-12-04 Koichi Nagano , Takashi Shioya , Takao Yamaguchi

We compute Hoelder Complexes,i.e. the complete bi-Lipschitz invariants, for germs of real weighed homogeneous algebraic or semialgebraic surfaces.

Algebraic Geometry · Mathematics 2007-12-18 Lev Birbrair , Alexandre Fernandes

We prove the existence of primitive curves and positivity of intersections of $J$-complex curves for Lipschitz-continuous almost complex structures. These results are deduced from the Comparison Theorem for $J$-holomorphic maps in Lipschitz…

Complex Variables · Mathematics 2015-03-13 S. Ivashkovich , V. Shevchishin

This paper regroups some of the basic properties of Lipschitz maps and their flows. Many of the results presented here are classical in the case of smooth maps. We prove them here in the Lipschitz case for a better understanding of the…

Classical Analysis and ODEs · Mathematics 2019-01-23 Youness Boutaib

The germ of an algebraic variety is naturally equipped with two different metrics up to bilipschitz equivalence. The inner metric and the outer metric. One calls a germ of a variety Lipschitz normally embedded if the two metrics are…

Algebraic Geometry · Mathematics 2017-03-14 Dmitry Kerner , Helge Møller Pedersen , Maria A. S. Ruas
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