Lorentzian CR structures and nonembeddability
In this paper we construct examples of CR deformations of Lorentzian hypersurfaces which are CR embeddable at all points outside an arbitrarily small compact set whose interior contains a point where CR embeddablity is not possible.
Mathematics Subject Classification32V05 32V30 32G07
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The first author was supported by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, Grant BR 3363/2-1).