The Ptolemaean Inequality in the closure of complex hyperbolic plane
We prove Ptolemaean Inequality and Ptolemaeus' Theorem in the closure complex hyperbolic plane endowed with the Cygan metric.
math.MG↗
arXiv subjects
Nilgün Sönmez
Publications and source records attributed to Nilgün Sönmez.
Cyclic polygons in classical geometry
Formulas about the side lengths, diagonal lengths or radius of the circumcircle of a cyclic polygon in Euclidean geometry, hyperbolic geometry or spherical geometry can be unified.
math.MG↗