Nowhere minimal CR submanifolds and Levi-flat hypersurfaces

Details Nowhere minimal CR submanifolds and Levi-flat hypersurfaces Nowhere minimal CR submanifolds and Levi-flat hypersurfaces

2006-06-06

arxiv.org/abs/math/0606141v5

J. Geom. Anal. 17 (2007), no. 2, 321--342

Mathematics

Complex Variables

21 pages; conjecture 2.8 was removed in proof; to appear in J. Geom. Anal

Scientific paper

10.1007/BF02930726

A local uniqueness property of holomorphic functions on real-analytic nowhere minimal CR submanifolds of higher codimension is investigated. A sufficient condition called almost minimality is given and studied. A weaker necessary condition, being contained a possibly singular real-analytic Levi-flat hypersurface is studied and characterized. This question is completely resolved for algebraic submanifolds of codimension 2 and a sufficient condition for noncontainment is given for non algebraic submanifolds. As a consequence, an example of a submanifold of codimension 2, not biholomorphically equivalent to an algebraic one, is given. We also investigate the structure of singularities of Levi-flat hypersurfaces.

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