Wikipedia

Heptagonal tiling honeycomb

(Redirected from Apeirogonal tiling honeycomb)
Heptagonal tiling honeycomb
Type Regular honeycomb
Schläfli symbol {7,3,3}
Coxeter diagram
Cells {7,3}
Faces Heptagon {7}
Vertex figure tetrahedron {3,3}
Dual {3,3,7}
Coxeter group [7,3,3]
Properties Regular

In the geometry of hyperbolic 3-space, the heptagonal tiling honeycomb or 7,3,3 honeycomb a regular space-filling tessellation (or honeycomb). Each infinite cell consists of a heptagonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.

Geometry

edit

The Schläfli symbol of the heptagonal tiling honeycomb is {7,3,3}, with three heptagonal tilings meeting at each edge. The vertex figure of this honeycomb is a tetrahedron, {3,3}.

 
Poincaré disk model
(vertex centered) 		 
Rotating 		 
Ideal surface
edit

It is a part of a series of regular polytopes and honeycombs with {p,3,3} Schläfli symbol, and tetrahedral vertex figures:

{p,3,3} honeycombs
Space S3 H3
Form Finite Paracompact Noncompact
Name {3,3,3} {4,3,3} {5,3,3} {6,3,3} {7,3,3} {8,3,3} ... {∞,3,3}
Image              
Coxeter diagrams
  		1                                                        
4                                
6                                
12                          
24            
Cells
{p,3}
      		 
{3,3}
      		 
{4,3}
     
     
    		 
{5,3}
      		 
{6,3}
     
     
    		 
{7,3}
      		 
{8,3}
     
     
     		 
{∞,3}
     
     
    

It is a part of a series of regular honeycombs, {7,3,p}.

{7,3,3} {7,3,4} {7,3,5} {7,3,6} {7,3,7} {7,3,8} ...{7,3,∞}
             

It is a part of a series of regular honeycombs, with {7,p,3}.

{7,3,3} {7,4,3} {7,5,3}...
     

Octagonal tiling honeycomb

edit
Octagonal tiling honeycomb
Type Regular honeycomb
Schläfli symbol {8,3,3}
t{8,4,3}
2t{4,8,4}
t{4[3,3]}
Coxeter diagram        
       
       
     
      (all 4s)
Cells {8,3}  
Faces Octagon {8}
Vertex figure tetrahedron {3,3}
Dual {3,3,8}
Coxeter group [8,3,3]
Properties Regular

In the geometry of hyperbolic 3-space, the octagonal tiling honeycomb or 8,3,3 honeycomb a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an octagonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.

The Schläfli symbol of the octagonal tiling honeycomb is {8,3,3}, with three octagonal tilings meeting at each edge. The vertex figure of this honeycomb is an tetrahedron, {3,3}.

 
Poincaré disk model (vertex centered) 		 
Direct subgroups of [8,3,3]

Apeirogonal tiling honeycomb

edit
Apeirogonal tiling honeycomb
Type Regular honeycomb
Schläfli symbol {∞,3,3}
t{∞,3,3}
2t{∞,∞,∞}
t{∞[3,3]}
Coxeter diagram        
       
       
      
      (all ∞)
Cells {∞,3}  
Faces Apeirogon {∞}
Vertex figure tetrahedron {3,3}
Dual {3,3,∞}
Coxeter group [∞,3,3]
Properties Regular

In the geometry of hyperbolic 3-space, the apeirogonal tiling honeycomb or ∞,3,3 honeycomb a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an apeirogonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.

The Schläfli symbol of the apeirogonal tiling honeycomb is {∞,3,3}, with three apeirogonal tilings meeting at each edge. The vertex figure of this honeycomb is an tetrahedron, {3,3}.

The "ideal surface" projection below is a plane-at-infinity, in the Poincare half-space model of H3. It shows an Apollonian gasket pattern of circles inside a largest circle.

 
Poincaré disk model (vertex centered) 		 
Ideal surface

See also

edit

References

edit
  • 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 Archived 2016-06-10 at the Wayback Machine) 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) [1]
  • Hao Chen, Jean-Philippe Labbé, Lorentzian Coxeter groups and Boyd-Maxwell ball packings, (2013)[2]
  • Visualizing Hyperbolic Honeycombs arXiv:1511.02851 Roice Nelson, Henry Segerman (2015)
edit
Retrieved from "https://en.wikipedia.org/w/index.php?title=Heptagonal_tiling_honeycomb&oldid=1238390903#Apeirogonal_tiling_honeycomb"