On the image in $H^2(Q^3;R)$ of the set of closed 2-forms with preassigned kernel

If $(P^{2n},\omega)$ is a symplectic manifold and $Q^3$ is its orientable closed submanifold such that $\omega/Q\ne0$, then there arises a one-dimensional distribution $\mathcal L=\operatorname{Ker}(\omega/Q)$. We study the dependence of $\omega$ in a neighborhood of $Q^3$ and of $[\omega]\in H^2(Q;R)$ on $\mathcal L$. Bibl. 13 titles.