Levi-flat world: a survey of local theory

Authors

  • A. Sukhov
    Université de Lille (Sciences et Technologies), U.F.R. de Mathématiques, 59655 Villeneuve d’Ascq, Cedex, France

DOI:

https://doi.org/10.13108/2017-9-3-172

Keywords:

CR structure, Levi-flat manifold.

Abstract

This expository paper concerns local properties of Levi-flat real analytic manifolds with singularities. Levi-flat manifolds arise naturally in Complex Geometry and Foliation Theory. In many cases (global) compact Levi-flat manifolds without singularities do not exist. These global obstructions make natural the study of Levi-flat objects with singularities because they always exist. The present expository paper deals with some recent results on local geometry of Levi-flat singularities. One of the main questions concerns an extension of the Levi foliation as a holomorphic foliation to a full neighborhood of singularity. It turns out that in general such extension does not exist. Nevertheless, the Levi foliation always extends as a holomorphic web (a foliation with branching) near a non-dicritical singularity. We also present an efficient criterion characterizing these singularities.

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Published

20.09.2017