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Tesselation on the Hyperbolic plane

Tessellations over the 3 types of geometry

A {k,n} regular tessellation is defined as a tiling by regular n-gons (convex regular polygons that cover all the space) where k polygons of n sides meet at each vertex. k, n 3. On the Euclidean Plane the only choices are {6,3}, {4,4} and {3,6} regular tessellations by traingles, squares or hexagons. Theorem of Classification. For any k,n 3, there exists a tiling on the one type of geometry depending:
  • If (1/k) + (1/n) > 1/2, then the tilling is spherical
  •  If (1/k) + (1/n) = 1/2, then the tilling is euclidean
  • If (1/k) + (1/n) < 1/2, then the tilling is hyperbolic.
Consequence. If we dealing with triangles (n= 3), then when k = 3, 4 or 5 we get an spherical tiling. For k = 6 we get an euclidean tiling, and for k 7 we get an hyperbolic tessellation. As an example we can have {7,3} and {8,3] tessellations. This last one in Circle Limit III.

{7,3} tesellation of the hyperbolic plane

{7,3} tesellation of the hyperbolic plane