Wallpaper on the Poincaré Half-Plane
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Frank A. Farris  suggests superposition of one or two functions of the form , to create wallpaper-like tilings of the Poincaré half-plane, the upper half of the complex plane. This Demonstration uses the composite function .
Contributed by: Izidor Hafner (March 2016)
(Based on work by Frank A. Farris)
Open content licensed under CC BY-NC-SA
 Frank A. Farris, Creating Symmetry: The Artful Mathematics of Wallpaper Patterns, Princeton: Princeton University Press, 2015 pp. 189–199.
"Wallpaper on the Poincaré Half-Plane"
Wolfram Demonstrations Project
Published: March 15 2016