Jet bundle cohomology

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Consider a base manifold $\mathcal{M}$ and a smooth bundle $E\to\mathcal{M}$. I am interested in the cohomology groups of the variational bicomplex associated with the jet bundle $J^{\infty}E$. In particular, if $d$ is the exterior derivative over $\mathcal{M}$ and $\delta$ is the variational derivative, given that we know the structure of $E$, what can we say about the cohomology of $J^{\infty}E$ induced by $\delta$?