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On the ampleness of positive CR line bundles over Levi-flat manifolds

We give an example of a compact Levi-flat CR 3-manifold with a positive-along-leaves CR line bundle which is not ample with respect to transversely infinitely differentiable CR sections. This example shows that we cannot improve the regularity of Kodaira type embedding theorem for compact Levi-flat CR manifolds obtained by Ohsawa and Sibony.

preprint2013arXivOpen access
Masanori Adachi
math.CVmath.DS
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Masanori Adachi

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