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Omnitruncated simplicial honeycomb

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In geometry an omnitruncated simplicial honeycomb or omnitruncated n-simplex honeycomb is an n-dimensional uniform tessellation, based on the symmetry of the affine Coxeter group. Each is composed of omnitruncated simplex facets. The vertex figure for each is an irregular n-simplex.

The facets of an omnitruncated simplicial honeycomb are called permutahedra and can be positioned in n+1 space with integral coordinates, permutations of the whole numbers (0,1,..,n).

n Image Tessellation Facets Vertex figure Facets per vertex figure Vertices per vertex figure
1 Apeirogon
Line segment Line segment 1 2
2 Hexagonal tiling

hexagon
Equilateral triangle
3 hexagons 3
3 Bitruncated cubic honeycomb

Truncated octahedron
irr. tetrahedron
4 truncated octahedron 4
4 Omnitruncated 4-simplex honeycomb

Omnitruncated 4-simplex
irr. 5-cell
5 omnitruncated 4-simplex 5
5 Omnitruncated 5-simplex honeycomb

Omnitruncated 5-simplex
irr. 5-simplex
6 omnitruncated 5-simplex 6
6 Omnitruncated 6-simplex honeycomb

Omnitruncated 6-simplex
irr. 6-simplex
7 omnitruncated 6-simplex 7
7 Omnitruncated 7-simplex honeycomb

Omnitruncated 7-simplex
irr. 7-simplex
8 omnitruncated 7-simplex 8
8 Omnitruncated 8-simplex honeycomb

Omnitruncated 8-simplex
irr. 8-simplex
9 omnitruncated 8-simplex 9

Projection by folding

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The (2n-1)-simplex honeycombs can be projected into the n-dimensional omnitruncated hypercubic honeycomb by a geometric folding operation that maps two pairs of mirrors into each other, sharing the same vertex arrangement:

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See also

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References

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  • George Olshevsky, Uniform Panoploid Tetracombs, Manuscript (2006) (Complete list of 11 convex uniform tilings, 28 convex uniform honeycombs, and 143 convex uniform tetracombs)
  • Branko Grünbaum, Uniform tilings of 3-space. Geombinatorics 4(1994), 49 - 56.
  • Norman Johnson Uniform Polytopes, Manuscript (1991)
  • Coxeter, H.S.M. Regular Polytopes, (3rd edition, 1973), Dover edition, ISBN 0-486-61480-8
  • Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by F. Arthur Sherk, Peter McMullen, Anthony C. Thompson, Asia Ivic Weiss, Wiley-Interscience Publication, 1995, ISBN 978-0-471-01003-6 [1]
    • (Paper 22) H.S.M. Coxeter, Regular and Semi Regular Polytopes I, [Math. Zeit. 46 (1940) 380-407, MR 2,10] (1.9 Uniform space-fillings)
    • (Paper 24) H.S.M. Coxeter, Regular and Semi-Regular Polytopes III, [Math. Zeit. 200 (1988) 3-45]
Space Family / /
E2 Uniform tiling 0[3] δ3 3 3 Hexagonal
E3 Uniform convex honeycomb 0[4] δ4 4 4
E4 Uniform 4-honeycomb 0[5] δ5 5 5 24-cell honeycomb
E5 Uniform 5-honeycomb 0[6] δ6 6 6
E6 Uniform 6-honeycomb 0[7] δ7 7 7 222
E7 Uniform 7-honeycomb 0[8] δ8 8 8 133331
E8 Uniform 8-honeycomb 0[9] δ9 9 9 152251521
E9 Uniform 9-honeycomb 0[10] δ10 10 10
E10 Uniform 10-honeycomb 0[11] δ11 11 11
En-1 Uniform (n-1)-honeycomb 0[n] δn n n 1k22k1k21