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Hexagonal tiling-triangular tiling honeycomb

From Wikipedia, the free encyclopedia
Hexagonal tiling-triangular tiling honeycomb
TypeParacompact uniform honeycomb
Schläfli symbol{(3,6,3,6)} or {(6,3,6,3)}
Coxeter diagrams or or or
Cells{3,6}
{6,3}
r{6,3}
Facestriangular {3}
square {4}
hexagon {6}
Vertex figure
rhombitrihexagonal tiling
Coxeter group[(6,3)[2]]
PropertiesVertex-uniform, edge-uniform

In thegeometry ofhyperbolic 3-space, thehexagonal tiling-triangular tiling honeycomb is aparacompact uniform honeycomb, constructed fromtriangular tiling,hexagonal tiling, andtrihexagonal tiling cells, in arhombitrihexagonal tilingvertex figure. It has a single-ring Coxeter diagram,, and is named by its two regular cells.

Ageometric honeycomb is aspace-filling ofpolyhedral or higher-dimensionalcells, so that there are no gaps. It is an example of the more general mathematicaltiling ortessellation in any number of dimensions.

Honeycombs are usually constructed in ordinaryEuclidean ("flat") space, like theconvex uniform honeycombs. They may also be constructed innon-Euclidean spaces, such ashyperbolic uniform honeycombs. Any finiteuniform polytope can be projected to itscircumsphere to form a uniform honeycomb in spherical space.

Symmetry

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A lower symmetry form, index 6, of this honeycomb can be constructed with [(6,3,6,3*)] symmetry, represented by acube fundamental domain, and an octahedralCoxeter diagram.

Related honeycombs

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Thecyclotruncated octahedral-hexagonal tiling honeycomb, has a higher symmetry construction as theorder-4 hexagonal tiling.

See also

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References

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  • Coxeter,Regular Polytopes, 3rd. ed., Dover Publications, 1973.ISBN 0-486-61480-8. (Tables I and II: Regular polytopes and honeycombs, pp. 294–296)
  • Coxeter,The Beauty of Geometry: Twelve Essays, Dover Publications, 1999ISBN 0-486-40919-8 (Chapter 10: Regular honeycombs in hyperbolic space, Summary tables II, III, IV, V, p212-213)
  • Jeffrey R. WeeksThe Shape of Space, 2nd editionISBN 0-8247-0709-5 (Chapter 16-17: Geometries on Three-manifolds I, II)
  • Norman JohnsonUniform Polytopes, Manuscript
    • N.W. Johnson:The Theory of Uniform Polytopes and Honeycombs, Ph.D. Dissertation, University of Toronto, 1966
    • N.W. Johnson:Geometries and Transformations, (2018) Chapter 13: Hyperbolic Coxeter groups
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