The Ptolemaean Inequality in the closure of complex hyperbolic plane

Abstract

We prove Ptolemaean Inequality and Ptolemaeus' Theorem in the closure complex hyperbolic plane endowed with the Cygan metric.

11 pages

References in corpus (2)

• Moebius structures and Ptolemy spaces: boundary at infinity of complex hyperbolic spaces
• Moebius rigidity of invariant metrics in boundaries of symmetric spaces of rank 1