English

Infinite circle packings on surfaces with conical singularities

Geometric Topology 2024-12-31 v2 Combinatorics

Abstract

We show that given an infinite triangulation KK of a surface with punctures (i.e., with no vertices at the punctures) and a set of target cone angles smaller than π\pi at the punctures that satisfy a Gauss-Bonnet inequality, there exists a hyperbolic metric that has the prescribed angles and supports a circle packing in the combinatorics of KK. Moreover, if KK is very symmetric, then we can identify the underlying Riemann surface and show that it does not depend on the angles. In particular, this provides examples of a triangulation KK and a conformal class XX such that there are infinitely many conical hyperbolic structures in the conformal class XX with a circle packing in the combinatorics of KK. This is in sharp contrast with a conjecture of Kojima-Mizushima-Tan in the closed case.

Keywords

Cite

@article{arxiv.2305.03505,
  title  = {Infinite circle packings on surfaces with conical singularities},
  author = {Philip L. Bowers and Lorenzo Ruffoni},
  journal= {arXiv preprint arXiv:2305.03505},
  year   = {2024}
}

Comments

20 pages, 4 figures, comments welcome. v2: revised final version

R2 v1 2026-06-28T10:26:51.665Z