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A combinatorial approach to integrals of Kahan-Hirota-Kimura discretizations

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arxiv 1611.02651 v1 pith:UW2RW2U7 submitted 2016-11-08 nlin.SI cs.NAmath-phmath.MPmath.NA

A combinatorial approach to integrals of Kahan-Hirota-Kimura discretizations

classification nlin.SI cs.NAmath-phmath.MPmath.NA
keywords combinatorialdiscretizationsintegralskahan-hirota-kimuramotionpoissonspacesvector
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider an Ansatz for the study of the existence of formal integrals of motion for Kahan-Hirota-Kimura discretizations. In this context, we give a combinatorial proof of the formula of Celledoni-McLachlan-Owren-Quispel for an integral of motion of the discretization in the case of cubic Hamiltonian systems on symplectic vector spaces and Poisson vector spaces with constant Poisson structure.

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