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Hilbert metric and quasiconformal mappings

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arxiv 2502.18109 v1 pith:46GNZ4SO submitted 2025-02-25 math.CV

classification math.CV
keywords metrichilbertexpressedidentitymappingsproofproveterms
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We prove a functional identity between the Hilbert metric and the visual angle metric in the unit disk. The proof utilizes the Poincar\'e hyperbolic metric in terms of which both metrics can be expressed. This identity then yields sharp distortion results for quasiregular mappings and analytic functions, expressed in terms of the Hilbert metric. We also prove that Hilbert circles are, in fact, Euclidean ellipses. The proof makes use of computer algebra methods. In particular, Gr\"obner bases are used.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On families of Finsler metrics

    math.DG 2025-06 conditional novelty 6.0 of 10

    For Finsler metrics with bi-geodesics, the arithmetic and maximum symmetrisations of the distance are shown to be Finsler, with explicit Lagrangians, generalising known Hilbert and Funk results.

  2. On the average scale-invariant Cassinian metric

    math.MG 2025-06 conditional novelty 6.0 of 10

    The average scale-invariant Cassinian metric is sharply comparable to four standard hyperbolic-type metrics, and its balls in punctured Euclidean space are convex exactly for radius at most log 3.

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