Alternated octagonal tiling
| Alternated octagonal tiling | |
|---|---|
| Alternated octagonal tiling Poincaré disk model of the hyperbolic plane | |
| Type | Hyperbolic uniform tiling |
| Vertex configuration | (3.4)3 |
| Schläfli symbol | (4,3,3) s(4,4,4) |
| Wythoff symbol | 3 | 3 4 |
| Coxeter diagram | File:CDel label4.pngFile:CDel branch 10ru.pngFile:CDel split2.pngFile:CDel node.png File:CDel label4.pngFile:CDel branch hh.pngFile:CDel split2-44.pngFile:CDel node h.png |
| Symmetry group | [(4,3,3)], (*433) [(4,4,4)]+, (444) |
| Dual | Alternated octagonal tiling#Dual tiling |
| Properties | Vertex-transitive |
In geometry, the tritetragonal tiling or alternated octagonal tiling is a uniform tiling of the hyperbolic plane. It has Schläfli symbols of {(4,3,3)} or h{8,3}.
Geometry
Although a sequence of edges seem to represent straight lines (projected into curves), careful attention will show they are not straight, as can be seen by looking at it from different projective centers.
| File:Uniform tiling 433-t0 3-fold.png Triangle-centered hyperbolic straight edges |
File:Uniform tiling 433-t0 edgecenter.png Edge-centered projective straight edges |
File:Uniform tiling 433-t0 point.png Point-centered projective straight edges |
Dual tiling
File:Uniform dual tiling 433-t0.png
In art
Circle Limit III is a woodcut made in 1959 by Dutch artist M. C. Escher, in which "strings of fish shoot up like rockets from infinitely far away" and then "fall back again whence they came". White curves within the figure, through the middle of each line of fish, divide the plane into squares and triangles in the pattern of the tritetragonal tiling. However, in the tritetragonal tiling, the corresponding curves are chains of hyperbolic line segments, with a slight angle at each vertex, while in Escher's woodcut they appear to be smooth hypercycles.
Related polyhedra and tiling
See also
References
- John Horton Conway, Heidi Burgiel, Chaim Goodman-Strauss, The Symmetries of Things 2008, ISBN 978-1-56881-220-5 (Chapter 19, The Hyperbolic Archimedean Tessellations)
- "Chapter 10: Regular honeycombs in hyperbolic space". The Beauty of Geometry: Twelve Essays. Dover Publications. 1999. ISBN 0-486-40919-8. LCCN 99035678.
External links
- Douglas Dunham Department of Computer Science University of Minnesota, Duluth
- Weisstein, Eric W. "Hyperbolic tiling". MathWorld.
- Weisstein, Eric W. "Poincaré hyperbolic disk". MathWorld.
- Hyperbolic and Spherical Tiling Gallery Archived 2013-03-24 at the Wayback Machine
- KaleidoTile 3: Educational software to create spherical, planar and hyperbolic tilings
- Hyperbolic Planar Tessellations, Don Hatch
