Integrable hierarchy of higher nonlinear Schrödinger type equations.
Integrals for holomorphic foliations with singularities having all leaves compact
We show that for a holomorphic foliation with singularities in a projective variety such that every leaf is quasiprojective, the set of rational functions that are constant on the leaves form a field whose transcendence degree equals the codimension of the foliation.
Involutive distributions, invariant manifolds, and defining equations.