Order-5 octahedral honeycomb
In the geometry of hyperbolic 3-space, the order-5 octahedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,4,5}. It has five octahedra {3,4} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many octahedra existing around each vertex in an order-5 square tiling vertex arrangement.
| Order-5 octahedral honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,4,5} | 
| Coxeter diagrams |        | 
| Cells | {3,4}  | 
| Faces | {3} | 
| Edge figure | {5} | 
| Vertex figure | {4,5}  | 
| Dual | {5,4,3} | 
| Coxeter group | [3,4,5] | 
| Properties | Regular | 
Images
    
|  Poincaré disk model (cell centered) |  Ideal surface | 
Related polytopes and honeycombs
    
It a part of a sequence of regular polychora and honeycombs with octahedral cells: {3,4,p}
| {3,4,p} polytopes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Space | S3 | H3 | |||||||||
| Form | Finite | Paracompact | Noncompact | ||||||||
| Name | {3,4,3}            | {3,4,4}                  | {3,4,5}        | {3,4,6}             | {3,4,7}        | {3,4,8}              | ... {3,4,∞}              | ||||
| Image |  |  |  |  |  |  |  | ||||
| Vertex figure |  {4,3}         |  {4,4}            |  {4,5}      |  {4,6}         |  {4,7}      |  {4,8}          |  {4,∞}          | ||||
Order-6 octahedral honeycomb
    
| Order-6 octahedral honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,4,6} {3,(3,4,3)} | 
| Coxeter diagrams |               =      | 
| Cells | {3,4}  | 
| Faces | {3} | 
| Edge figure | {6} | 
| Vertex figure | {4,6}  {(4,3,4)}  | 
| Dual | {6,4,3} | 
| Coxeter group | [3,4,6] [3,((4,3,4))] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-6 octahedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,4,6}. It has six octahedra, {3,4}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many octahedra existing around each vertex in an order-6 square tiling vertex arrangement.
|  Poincaré disk model (cell centered) |  Ideal surface | 
It has a second construction as a uniform honeycomb, Schläfli symbol {3,(4,3,4)}, Coxeter diagram, 



 , with alternating types or colors of octahedral cells. In Coxeter notation the half symmetry is [3,4,6,1+] = [3,((4,3,4))].
, with alternating types or colors of octahedral cells. In Coxeter notation the half symmetry is [3,4,6,1+] = [3,((4,3,4))].
Order-7 octahedral honeycomb
    
| Order-7 octahedral honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,4,7} | 
| Coxeter diagrams |        | 
| Cells | {3,4}  | 
| Faces | {3} | 
| Edge figure | {7} | 
| Vertex figure | {4,7}  | 
| Dual | {7,4,3} | 
| Coxeter group | [3,4,7] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-7 octahedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,4,7}. It has seven octahedra, {3,4}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many octahedra existing around each vertex in an order-7 square tiling vertex arrangement.
|  Poincaré disk model (cell centered) |  Ideal surface | 
Order-8 octahedral honeycomb
    
| Order-8 octahedral honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,4,8} | 
| Coxeter diagrams |        | 
| Cells | {3,4}  | 
| Faces | {3} | 
| Edge figure | {8} | 
| Vertex figure | {4,8}  | 
| Dual | {8,4,3} | 
| Coxeter group | [3,4,8] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the order-8 octahedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,4,8}. It has eight octahedra, {3,4}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many octahedra existing around each vertex in an order-8 square tiling vertex arrangement.
|  Poincaré disk model (cell centered) | 
Infinite-order octahedral honeycomb
    
| Infinite-order octahedral honeycomb | |
|---|---|
| Type | Regular honeycomb | 
| Schläfli symbols | {3,4,∞} {3,(4,∞,4)} | 
| Coxeter diagrams |               =       | 
| Cells | {3,4}  | 
| Faces | {3} | 
| Edge figure | {∞} | 
| Vertex figure | {4,∞}  {(4,∞,4)}  | 
| Dual | {∞,4,3} | 
| Coxeter group | [∞,4,3] [3,((4,∞,4))] | 
| Properties | Regular | 
In the geometry of hyperbolic 3-space, the infinite-order octahedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,4,∞}. It has infinitely many octahedra, {3,4}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many octahedra existing around each vertex in an infinite-order square tiling vertex arrangement.
|  Poincaré disk model (cell centered) |  Ideal surface | 
It has a second construction as a uniform honeycomb, Schläfli symbol {3,(4,∞,4)}, Coxeter diagram, 





 =
 = 




 , with alternating types or colors of octahedral cells. In Coxeter notation the half symmetry is [3,4,∞,1+] = [3,((4,∞,4))].
, with alternating types or colors of octahedral cells. In Coxeter notation the half symmetry is [3,4,∞,1+] = [3,((4,∞,4))].
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
    
- 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.