Hyperbolic elliptic parabolic disks approximated by half distance bands

Fuente: arXiv
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Main Author: Lakos, Gyula
Format: Preprint
Published: 2026
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author Lakos, Gyula
author_facet Lakos, Gyula
contents Hyperbolic elliptic parabolic disks can be described by the inequality $\frac{x^2}{C^2}+2y^2-2y\leq0$ ($0<C<1$) in the unit disk based Beltrami--Cayley--Klein model of the hyperbolic geometry, up to hyperbolic congruences. The hyperbolic elliptic parabolic disks considered above are sort of close to their supporting half distance bands given by the inequalities $\frac{x^2}{C^2}+ y^2-1\leq0$ and $y\geq0$. Here we consider what `close' might mean, and we look for even more precise approximations, in terms of area and circumference.
format Preprint
id arxiv_https___arxiv_org_abs_2603_08226
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Hyperbolic elliptic parabolic disks approximated by half distance bands
Lakos, Gyula
History and Overview
Metric Geometry
Primary: 51M10, Secondary: 51M09, 51M25
Hyperbolic elliptic parabolic disks can be described by the inequality $\frac{x^2}{C^2}+2y^2-2y\leq0$ ($0<C<1$) in the unit disk based Beltrami--Cayley--Klein model of the hyperbolic geometry, up to hyperbolic congruences. The hyperbolic elliptic parabolic disks considered above are sort of close to their supporting half distance bands given by the inequalities $\frac{x^2}{C^2}+ y^2-1\leq0$ and $y\geq0$. Here we consider what `close' might mean, and we look for even more precise approximations, in terms of area and circumference.
title Hyperbolic elliptic parabolic disks approximated by half distance bands
topic History and Overview
Metric Geometry
Primary: 51M10, Secondary: 51M09, 51M25
url https://arxiv.org/abs/2603.08226