| Order-6-4 triangular honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,6,4} | 
| Coxeter diagrams |               =      | 
| Cells | {3,6}  | 
| Faces | {3} | 
| Edge figure | {4} | 
| Vertex figure | {6,4}  r{6,6}  | 
| Dual | {4,6,3} | 
| Coxeter group | [3,6,4] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-6-4 triangular honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,6,4}.
Geometry
It has four triangular tiling {3,6} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an order-4 hexagonal tiling vertex arrangement.
|  Poincaré disk model |  Ideal surface | 
It has a second construction as a uniform honeycomb, Schläfli symbol {3,61,1}, Coxeter diagram, 



 , with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,4,1+] = [3,61,1].
, with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,4,1+] = [3,61,1].
Related polytopes and honeycombs
It a part of a sequence of regular polychora and honeycombs with triangular tiling cells: {3,6,p}
| {3,6,p} polytopes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Space | H3 | ||||||||||
| Form | Paracompact | Noncompact | |||||||||
| Name | {3,6,3}             | {3,6,4}             | {3,6,5}        | {3,6,6}             | ... {3,6,∞}              | ||||||
| Image |  |  |  |  |  | ||||||
| Vertex figure |  {6,3}         |  {6,4}         |  {6,5}      |  {6,6}         |  {6,∞}          | ||||||
Order-6-5 triangular honeycomb
| Order-6-5 triangular honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbol | {3,6,5} | 
| Coxeter diagram |        | 
| Cells | {3,6}  | 
| Faces | {3} | 
| Edge figure | {5} | 
| Vertex figure | {6,5}  | 
| Dual | {5,6,3} | 
| Coxeter group | [3,6,5] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-6-3 triangular honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,6,5}. It has five triangular tiling, {3,6}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an order-5 hexagonal tiling vertex arrangement.
|  Poincaré disk model |  Ideal surface | 
Order-6-6 triangular honeycomb
| Order-6-6 triangular honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,6,6} {3,(6,3,6)} | 
| Coxeter diagrams |               =      | 
| Cells | {3,6}  | 
| Faces | {3} | 
| Edge figure | {6} | 
| Vertex figure | {6,6}  {(6,3,6)}  | 
| Dual | {6,6,3} | 
| Coxeter group | [3,6,6] [3,((6,3,6))] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-6-6 triangular honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,6,6}. It has infinitely many triangular tiling, {3,6}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an order-6 triangular tiling vertex arrangement.
|  Poincaré disk model |  Ideal surface | 
It has a second construction as a uniform honeycomb, Schläfli symbol {3,(6,3,6)}, Coxeter diagram, 





 =
 = 



 , with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,6,1+] = [3,((6,3,6))].
, with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,6,1+] = [3,((6,3,6))].
Order-6-infinite triangular honeycomb
| Order-6-infinite triangular honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,6,∞} {3,(6,∞,6)} | 
| Coxeter diagrams |               =       | 
| Cells | {3,6}  | 
| Faces | {3} | 
| Edge figure | {∞} | 
| Vertex figure | {6,∞}  {(6,∞,6)}  | 
| Dual | {∞,6,3} | 
| Coxeter group | [∞,6,3] [3,((6,∞,6))] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-6-infinite triangular honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,6,∞}. It has infinitely many triangular tiling, {3,6}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an infinite-order triangular tiling vertex arrangement.
|  Poincaré disk model |  Ideal surface | 
It has a second construction as a uniform honeycomb, Schläfli symbol {3,(6,∞,6)}, Coxeter diagram, 





 =
 = 




 , with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,∞,1+] = [3,((6,∞,6))].
, with alternating types or colors of triangular tiling cells. In Coxeter notation the half symmetry is [3,6,∞,1+] = [3,((6,∞,6))].
See also
References
- Coxeter, Regular Polytopes, 3rd. ed., Dover Publications, 1973. ISBN 0-486-61480-8. (Tables I and II: Regular polytopes and honeycombs, pp. 294–296)
- The Beauty of Geometry: Twelve Essays (1999), Dover Publications, LCCN 99-35678, ISBN 0-486-40919-8 (Chapter 10, Regular Honeycombs in Hyperbolic Space) Table III
- Jeffrey R. Weeks The Shape of Space, 2nd edition ISBN 0-8247-0709-5 (Chapters 16–17: Geometries on Three-manifolds I,II)
- George Maxwell, Sphere Packings and Hyperbolic Reflection Groups, JOURNAL OF ALGEBRA 79,78-97 (1982)
- Hao Chen, Jean-Philippe Labbé, Lorentzian Coxeter groups and Boyd-Maxwell ball packings, (2013)
- Visualizing Hyperbolic Honeycombs arXiv:1511.02851 Roice Nelson, Henry Segerman (2015)
External links
- Spherical Video: {3,6,∞} honeycomb with parabolic Möbius transform YouTube, Roice Nelson
- John Baez, Visual insights: {7,3,3} Honeycomb (2014/08/01) {7,3,3} Honeycomb Meets Plane at Infinity (2014/08/14)
- Danny Calegari, Kleinian, a tool for visualizing Kleinian groups, Geometry and the Imagination 4 March 2014.