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Poisson cohomology of scalar multidimensional Dubrovin-Novikov brackets

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arxiv 1512.05744 v2 pith:NYMXYBOB submitted 2015-12-17 math.DG math-phmath.MPnlin.SI

classification math.DGmath-phmath.MPnlin.SI
keywords cohomologypoissoncasedubrovin-novikovscalarbracketbracketscompute
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We compute the Poisson cohomology of a scalar Poisson bracket of Dubrovin-Novikov type with $D$ independent variables. We find that the second and third cohomology groups are generically non-vanishing in $D>1$. Hence, in contrast with the $D=1$ case, the deformation theory in the multivariable case is non-trivial.

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  1. Double Poisson (vertex) algebra cohomology

    math.RT 2025-09 accept novelty 8.0 of 10

    The authors define a completed double Poisson cohomology valid for all double Poisson brackets, and introduce three cohomology theories for double Poisson vertex algebras, with representation functor compatibility.

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