The regular polygon convergence conjecture for Möbius and hyperbolic metrics

Let GkG_k be the regular kk-gon described in the paper, and let x,ykGkx,y\in\bigcap_k G_k be distinct points. Let ρGk\rho_{G_k} and δGk\delta_{G_k} denote the Möbius and hyperbolic metrics in GkG_k. The regular polygon convergence conjecture.

limkδGk(x,y)ρGk(x,y)1.\lim_{k\to\infty}\frac{\delta_{G_k}(x,y)}{\rho_{G_k}(x,y)}\to1.

The conjecture expresses convergence of the metric quotient toward the equality known in the unit disk as regular polygons increasingly resemble the disk; no proof or resolution is stated.

Sources & referencesView supporting material

Primary source

Oona Rainio and Matti Vuorinen, “Möbius metric in sector domains”, arXiv:2104.05972 (2023).

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