English

Spherical and hyperbolic conics

Metric Geometry 2017-02-23 v1

Abstract

This is a survey of metric properties of non-Euclidean conics, mainly based on works of Chasles and Story. A spherical conic is the intersection of the sphere with a quadratic cone; similarly, a hyperbolic conic is the intersection of the Beltrami-Cayley-Klein disk with an affine conic. Non-Euclidean conics have metric properties similar to those of Euclidean conics, and even more due to the polarity that works here better than in the Euclidean plane.

Keywords

Cite

@article{arxiv.1702.06860,
  title  = {Spherical and hyperbolic conics},
  author = {Ivan Izmestiev},
  journal= {arXiv preprint arXiv:1702.06860},
  year   = {2017}
}

Comments

50 pages, 37 figures

R2 v1 2026-06-22T18:25:27.576Z