Studies of cohomology groups in Poisson geometry

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I studied about Sp(2n) relative Gel'fand-Kalinin-Fuks cohomology groups of the formal Hamiltonian vector fields on the 2n-dimensional symplectic vector space ant got the results below. 1) In 2-dim case, we determined the GKF cohomology groups for weight 20. 2) In the case of 4-dim, using Littlewood-Richardson rule, we determined the GKF cohomology groups for weight 2,4 and 6. This was published in J.Math.Sci.Univ.Tokyo 19(2012)1-18, by the title Lower weight Gel'fand-Kalinin-Fuks cohomology groups of the formal Hamiltonian vector fields on R4. 3) By using crystal base theory, in 6-dimensional case, we studied the GKF cohomology groups for weight 2,4 and 6. The result is uploaded on http://arxiv.org by The relative Gel'fand-Kalinin-Fuks cohomology groups of the formal Hamiltonian vector fields on 6-dimensional plane, arXiv:1402.6834. 4) I gave an affirmative answer to a conjecture, and submitted to some Journal by the title, ``An affirmative answer to a conjecture for Metoki class''.