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A circle in the hyperbolic plane

· John Cook · Nov. 28, 2025, 3:09 p.m.
Math Geometry mathematics complex numbers Geometry Hyperbolic Geometry
Summary
This blog post explores the concept of circles in the hyperbolic plane, specifically within the context of the upper half plane in complex numbers, and discusses how distances are measured differently in hyperbolic geometry.
Read full post on www.johndcook.com →
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