hypersurface. In some sense the reverse statement is true: a connected compact generic
immersed $ C^{2n-1} $ regular Hopf hypersurface in the complex projective space is a tube
over an irreducible algebraic variety. In the complex hyperbolic space a connected compact
generic immersed $ C^{2n-1} $ regular Hopf hypersurface is a geodesic hypersphere.