Hello,

$CR$ manifold for example $S^1\times C^{n-1}$ is every where levi flat. Can I have example of $CR$ manifold which has at least one non levi flat point.

I can't see what the happening in Non-Levi flat points. Sorry for vague question and if it is trivial.. .... but basically i want to understand the non levi flat point such that i can easily determine all non levi flat point of given CR manifold...

Any comment and suggestion are welcome.. Thanks in advance.