| Truncated heptagonal tiling | |
|---|---|
| Poincaré disk model of the hyperbolic plane | |
| Type | Hyperbolic uniform tiling |
| Vertex configuration | 4.14.14 |
| Schläfli symbol | t{7,4} |
| Wythoff symbol | 2 4 | 7 2 7 7 | |
| Coxeter diagram | or |
| Symmetry group | [7,4], (*742)[7,7], (*772) |
| Dual | Order-7 tetrakis square tiling |
| Properties | Vertex-transitive |
In geometry, the truncated order-4 heptagonal tiling is a uniform tiling of the hyperbolic plane. It has Schläfli symbol of t{7,4}.
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Constructions
There are two uniform constructions of this tiling, first by the [7,4] kaleidoscope, and second by removing the last mirror, [7,4,1+], gives [7,7], (*772).
Two uniform constructions of 4.7.4.7| Name | Tetraheptagonal | Truncated heptaheptagonal |
|---|---|---|
| Image | ||
| Symmetry | [7,4](*742) | [7,7] = [7,4,1+](*772) = |
| Symbol | t{7,4} | tr{7,7} |
| Coxeter diagram |
Symmetry
There is only one simple subgroup [7,7]+, index 2, removing all the mirrors. This symmetry can be doubled to 742 symmetry by adding a bisecting mirror.
Small index subgroups of [7,7]| Type | Reflectional | Rotational |
|---|---|---|
| Index | 1 | 2 |
| Diagram | ||
| Coxeter(orbifold) | [7,7] = (*772) | [7,7]+ = (772) |
Related polyhedra and tiling
*n42 symmetry mutation of truncated tilings: 4.2n.2n
| |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Symmetry*n42[n,4] | Spherical | Euclidean | Compact hyperbolic | Paracomp. | |||||||
| *242[2,4] | *342[3,4] | *442[4,4] | *542[5,4] | *642[6,4] | *742[7,4] | *842[8,4]... | *∞42[∞,4] | ||||
| Truncatedfigures | |||||||||||
| Config. | 4.4.4 | 4.6.6 | 4.8.8 | 4.10.10 | 4.12.12 | 4.14.14 | 4.16.16 | 4.∞.∞ | |||
| n-kisfigures | |||||||||||
| Config. | V4.4.4 | V4.6.6 | V4.8.8 | V4.10.10 | V4.12.12 | V4.14.14 | V4.16.16 | V4.∞.∞ | |||
Uniform heptagonal/square tilings
| |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Symmetry: [7,4], (*742) | [7,4]+, (742) | [7+,4], (7*2) | [7,4,1+], (*772) | ||||||||
| {7,4} | t{7,4} | r{7,4} | 2t{7,4}=t{4,7} | 2r{7,4}={4,7} | rr{7,4} | tr{7,4} | sr{7,4} | s{7,4} | h{4,7} | ||
| Uniform duals | |||||||||||
| V74 | V4.14.14 | V4.7.4.7 | V7.8.8 | V47 | V4.4.7.4 | V4.8.14 | V3.3.4.3.7 | V3.3.7.3.7 | V77 | ||
Uniform heptaheptagonal tilings
| |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Symmetry: [7,7], (*772) | [7,7]+, (772) | ||||||||||
| = = | = = | = = | = = | = = | = = | == | == | ||||
| {7,7} | t{7,7} | r{7,7} | 2t{7,7}=t{7,7} | 2r{7,7}={7,7} | rr{7,7} | tr{7,7} | sr{7,7} | ||||
| Uniform duals | |||||||||||
| V77 | V7.14.14 | V7.7.7.7 | V7.14.14 | V77 | V4.7.4.7 | V4.14.14 | V3.3.7.3.7 | ||||
- John H. 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.