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Double Multiplicative Poisson Vertex Algebras

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arxiv 2110.03418 v3 pith:TRM65L47 submitted 2021-10-07 math.RT math-phmath.MPmath.RAnlin.SI

classification math.RTmath-phmath.MPmath.RAnlin.SI
keywords algebraspoissondoublemultiplicativevertextheyalgebraassociative
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We develop the theory of double multiplicative Poisson vertex algebras. These structures, defined at the level of associative algebras, are shown to be such that they induce a classical structure of multiplicative Poisson vertex algebra on the corresponding representation spaces. Moreover, we prove that they are in one-to-one correspondence with local lattice double Poisson algebras, a new important class among Van den Bergh's double Poisson algebras. We derive several classification results, and we exhibit their relation to non-abelian integrable differential-difference equations. A rigorous definition of double multiplicative Poisson vertex algebras in the non-local and rational cases is also provided.

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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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