English

A strong triangle inequality in hyperbolic geometry

Metric Geometry 2015-07-16 v1

Abstract

For a triangle in the hyperbolic plane, let α,β,γ\alpha,\beta,\gamma denote the angles opposite the sides a,b,ca,b,c, respectively. Also, let hh be the height of the altitude to side cc. Under the assumption that α,β,γ\alpha,\beta, \gamma can be chosen uniformly in the interval (0,π)(0,\pi) and it is given that α+β+γ<π\alpha+\beta+\gamma<\pi, we show that the strong triangle inequality a+b>c+ha + b > c + h holds approximately 79\% of the time. To accomplish this, we prove a number of theoretical results to make sure that the probability can be computed to an arbitrary precision, and the error can be bounded.

Keywords

Cite

@article{arxiv.1507.04033,
  title  = {A strong triangle inequality in hyperbolic geometry},
  author = {Csaba Biró and Robert C. Powers},
  journal= {arXiv preprint arXiv:1507.04033},
  year   = {2015}
}
R2 v1 2026-06-22T10:11:58.205Z