Lifting formulas, Moyal product, and Feigin spectral sequence

Details Lifting formulas, Moyal product, and Feigin spectral sequence Lifting formulas, Moyal product, and Feigin spectral sequence

1998-10-28

arxiv.org/abs/math/9810162v2

Mathematics

Quantum Algebra

7 pages, LaTeX2e

Scientific paper

It is shown, that each Lifting cocycle $\Psi_{2n+1},\Psi_{2n+3},\Psi_{2n+5},...$ ([Sh1], [Sh2]) on the Lie algebra $\Dif_n$ of polynomial differential operators on an $n$-dimensional complex vector space is the sum of two cocycles, its even and odd part. We study in more details the first case $n=1$. It is shown, that any nontrivial linear combination of two 3-cocycles on the Lie algebra $\Dif_1$, arising from the 3-cocycle~$\Psi_3$, is not cohomologous to zero, in a contradiction with the Feigin conjecture~[F]. The new conjecture on the cohomology $H^\ndot_\Lie(\Dif_1;\C)$ is made.

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