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arXiv · 1207.5114

Complex cross--ratios and the Ptolemaean inequality

Ioannis D. Platis
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Abstract

We use Korányi--Reimann complex cross--ratios to prove the Ptolemaean inequality and the Theorem of Ptolemaeus in the setting of the boundary of complex hyperbolic space and the first Heisenberg group.

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Ioannis D. Platis. 2012-07-21. Complex cross--ratios and the Ptolemaean inequality. https://arxiv.org/abs/1207.5114

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