Jump to content

Order-4 square hosohedral honeycomb

From Wikipedia, the free encyclopedia
(Redirected from Order-4-4 digonal honeycomb)
Order-4 square hosohedral honeycomb

Centrally projected onto a sphere
Type Degenerate regular honeycomb
Schläfli symbol {2,4,4}
Coxeter diagrams
Cells {2,4}
Faces {2}
Edge figure {4}
Vertex figure {4,4}
Dual Order-2 square tiling honeycomb
Coxeter group [2,4,4]
Properties Regular

In geometry, the order-4 square hosohedral honeycomb is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {2,4,4}. It has 4 square hosohedra {2,4} around each edge. In other words, it is a packing of infinitely tall square columns. It is a degenerate honeycomb in Euclidean space, but can be seen as a projection onto the sphere. Its vertex figure, a square tiling is seen on each hemisphere.

Images

[edit]

Stereographic projections of spherical projection, with all edges being projected into circles.


Centered on pole

Centered on equator
[edit]

It is a part of a sequence of honeycombs with a square tiling vertex figure:

{p,4,4} honeycombs
Space E3 H3
Form Affine Paracompact Noncompact
Name {2,4,4} {3,4,4} {4,4,4} {5,4,4} {6,4,4} ..{∞,4,4}
Coxeter













 






Image
Cells
{2,4}

{3,4}

{4,4}

{5,4}

{6,4}

{∞,4}

Truncated order-4 square hosohedral honeycomb

[edit]
Order-2 square tiling honeycomb
Truncated order-4 square hosohedral honeycomb

Partial tessellation with alternately colored cubes
Type uniform convex honeycomb
Schläfli symbol {4,4}×{}
Coxeter diagrams

Cells {3,4}
Faces {4}
Vertex figure Square pyramid
Dual
Coxeter group [2,4,4]
Properties Uniform

The {2,4,4} honeycomb can be truncated as t{2,4,4} or {}×{4,4}, Coxeter diagram , seen as a layer of cubes, partially shown here with alternately colored cubic cells. Thorold Gosset identified this semiregular infinite honeycomb as a cubic semicheck.

The alternation of this honeycomb, , consists of infinite square pyramids and infinite tetrahedrons, between 2 square tilings.

See also

[edit]

References

[edit]
  • The Beauty of Geometry: Twelve Essays (1999), Dover Publications, LCCN 99-35678, ISBN 0-486-40919-8 (Chapter 10, Regular Honeycombs in Hyperbolic Space)