Distance-realization property for geodesics in the Heisenberg group

From papers

Let SRS_R denote the metric sphere of radius RR in the Heisenberg group, and let PS1P\in S_1. Suppose that the geodesic leaving the origin and reaching PP meets the tt-axis before it meets SRS_R.

Distance-realization property. Then the distance dist(P,SR)\operatorname{dist}(P,S_R) is realized by the point

(0,R2π).\left(0,\frac{R^2}{\pi}\right).

The statement proposes a specific nearest point on the larger sphere under the stated geodesic condition. The supplied text presents it as a property to study and gives no evidence that it has been proved or disproved.

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Sources & referencesView supporting material

Primary source

Nicola Arcozzi and Daniele Morbidelli, “Stability of isometric maps in the Heisenberg group”, arXiv:math/0508474 (2008).

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