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On moments of a polytope

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arxiv 1210.3193 v2 pith:EI3DWGP7 submitted 2012-10-11 math.MG math.CAmath.CO

classification math.MGmath.CAmath.CO
keywords functionpolytopesupportedverticesdensitylinearmeasuremoments
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We show that the multivariate generating function of appropriately normalized moments of a measure with homogeneous polynomial density supported on a compact polytope P in R^d is a rational function. Its denominator is the product of linear forms dual to the vertices of P raised to the power equal to the degree of the density function. Using this, we solve the inverse moment problem for the set of, not necessarily convex, polytopes having a given set S of vertices. Under a weak non-degeneracy assumption we also show that the uniform measure supported on any such polytope is a linear combination of uniform measures supported on simplices with vertices in S.

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  1. Algebraic relations between moments of plane polygons

    math.CV 2019-08 conditional novelty 7.0 of 10

    For an n-gon, all harmonic moments are rational functions of the first 2n-2 of them; adding anti-harmonic moments, the whole moment field is generated by the symmetric functions plus one area-like moment.

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