Cantic n-cube

In geometry of n dimensions or higher, a cantic n-cube, cantihalf n-cube, or truncated n-demicube is a uniform n-polytope, being a truncation of the n-demicube. It has half the vertices of a cantellated n-dimensional hypercube. It is a convex polytope.

Here are some examples:

Dimensional family of cantic n-cubes
n345678
Symmetry
[1+,4,3n-2]
[1+,4,3]
= [3,3]
[1+,4,32]
= [3,31,1]
[1+,4,33]
= [3,32,1]
[1+,4,34]
= [3,33,1]
[1+,4,35]
= [3,34,1]
[1+,4,36]
= [3,35,1]
Cantic
figure
Coxeter
=

=

=

=

=

=
Schläfli h2{4,3} h2{4,32} h2{4,33} h2{4,34} h2{4,35} h2{4,36}

Cartesian coordinates

The Cartesian coordinates for the vertices of a cantic n-cube centered at the origin and edge length 6√2 are coordinate permutations, where two dimensions have ±1, and the remaining n − 2 have ±3, with an odd number of plus signs overall.

Specific cases

Cantic 5-cube


D5 Coxeter plane projection
Schläfli symbolh2{4,3,3,3}
t{3,32,1}
Coxeter-Dynkin diagram =
4-faces42 total:
16 r{3,3,3}
16 t{3,3,3}
10 t{3,3,4}
Cells280 total:
80 {3,3}
120 t{3,3}
80 {3,4}
Faces640 total:
480 {3}
160 {6}
Edges560
Vertices160
Vertex figure
( )v{ }×{3}
Coxeter groupsD5, [32,1,1]

The cantic 5-cube is sometimes referred to as thin, short for truncated hemipenteract.

Orthographic projections
Coxeter plane B5
Graph
Dihedral symmetry [10/2]
Coxeter plane D5 D4
Graph
Dihedral symmetry [8] [6]
Coxeter plane D3 A3
Graph
Dihedral symmetry [4] [4]

Cantic 6-cube


D6 Coxeter plane projection
Schläfli symbolt0,1{3,33,1}
h2{4,34}
Coxeter-Dynkin diagram =
5-faces76
4-faces636
Cells2080
Faces3200
Edges2160
Vertices480
Vertex figure( )v[{ }x{3,3}]
Coxeter groupsD6, [33,1,1]

The cantic 6-cube is sometimes referred to as thax, short for truncated hemihexeract.

Orthographic projections
Coxeter plane B6
Graph
Dihedral symmetry [12/2]
Coxeter plane D6 D5
Graph
Dihedral symmetry [10] [8]
Coxeter plane D4 D3
Graph
Dihedral symmetry [6] [4]
Coxeter plane A5 A3
Graph
Dihedral symmetry [6] [4]

References

Family An Bn I2(p) / Dn E6 / E7 / E8 / F4 / G2 Hn
Regular polygon Triangle Square p-gon Hexagon Pentagon
Uniform polyhedron Tetrahedron Octahedron • Cube Demicube Dodecahedron • Icosahedron
Uniform polychoron Pentachoron 16-cell • Tesseract Demitesseract 24-cell 120-cell • 600-cell
Uniform 5-polytope 5-simplex 5-orthoplex • 5-cube 5-demicube
Uniform 6-polytope 6-simplex 6-orthoplex • 6-cube 6-demicube 122 • 221
Uniform 7-polytope 7-simplex 7-orthoplex • 7-cube 7-demicube 132 • 231 • 321
Uniform 8-polytope 8-simplex 8-orthoplex • 8-cube 8-demicube 142 • 241 • 421
Uniform n-polytope n-simplex n-orthoplex • n-cube n-demicube 1k2 • 2k1 • k21 n-pentagonal polytope
Topics: Polytope families • Regular polytope • List of regular polytopes and compounds • Polytope operations