Real circles tangent to 3 conics
Algebraic Geometry
2025-05-07 v1
Abstract
In this paper we study circles tangent to conics. We show there are generically complex circles tangent to three conics in the plane and we characterize the real discriminant of the corresponding polynomial system. We give an explicit example of conics with real circles tangent to them. We conjecture that 136 is the maximal number of real circles. Furthermore, we implement a hill-climbing algorithm to find instances of conics with many real circles, and we introduce a machine learning model that, given three real conics, predicts the number of circles tangent to these three conics.
Cite
@article{arxiv.2211.06876,
title = {Real circles tangent to 3 conics},
author = {Paul Breiding and Julia Lindberg and Wern Juin Gabriel Ong and Linus Sommer},
journal= {arXiv preprint arXiv:2211.06876},
year = {2025}
}
Comments
22 pages