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The Kontsevich graph orientation morphism revisited

Combinatorics 2021-07-23 v2 Mathematical Physics math.MP Quantum Algebra Symplectic Geometry

Abstract

The orientation morphism Or()(P) ⁣:γP˙Or(\cdot)(P)\colon \gamma\mapsto\dot{P} associates differential-polynomial flows P˙=Q(P)\dot{P}=Q(P) on spaces of bi-vectors PP on finite-dimensional affine manifolds NdN^d with (sums of) finite unoriented graphs γ\gamma with ordered sets of edges and without multiple edges and one-cycles. It is known that dd-cocycles γkerd\boldsymbol{\gamma}\in\ker d with respect to the vertex-expanding differential d=[ ⁣ ⁣ ⁣ ⁣ ⁣,]d=[{\bullet}\!\!{-}\!{-}\!\!{\bullet},\cdot] are mapped by OrOr to Poisson cocycles Q(P)ker[ ⁣[P,] ⁣]Q(P)\in\ker\,[\![ P,{\cdot}]\!], that is, to infinitesimal symmetries of Poisson bi-vectors PP. The formula of orientation morphism OrOr was expressed in terms of the edge orderings as well as parity-odd and parity-even derivations on the odd cotangent bundle ΠTNd\Pi T^* N^d over any dd-dimensional affine real Poisson manifold NdN^d. We express this formula in terms of (un)oriented graphs themselves, i.e. without explicit reference to supermathematics on ΠTNd\Pi T^* N^d.

Keywords

Cite

@article{arxiv.1904.13293,
  title  = {The Kontsevich graph orientation morphism revisited},
  author = {Arthemy V. Kiselev and Ricardo Buring},
  journal= {arXiv preprint arXiv:1904.13293},
  year   = {2021}
}

Comments

Int. workshop on Homotopy algebras, deformation theory and quantization (16-22 September 2018, Bedlewo, Poland), to appear in Banach Center Publications; 5 figures, 18 pages

R2 v1 2026-06-23T08:53:28.774Z