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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:
| n | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|
| 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 |
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| Coxeter | = |
= |
= |
= |
= |
= |
| Schläfli | h2{4,3} | h2{4,32} | h2{4,33} | h2{4,34} | h2{4,35} | h2{4,36} |
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.
D5 Coxeter plane projection | |
| Schläfli symbol | h2{4,3,3,3} t{3,32,1} |
| Coxeter-Dynkin diagram | |
| 4-faces | 42 total: 16 r{3,3,3} 16 t{3,3,3} 10 t{3,3,4} |
| Cells | 280 total: 80 {3,3} 120 t{3,3} 80 {3,4} |
| Faces | 640 total: 480 {3} 160 {6} |
| Edges | 560 |
| Vertices | 160 |
| Vertex figure | ( )v{ }×{3} |
| Coxeter groups | D5, [32,1,1] |
The cantic 5-cube is sometimes referred to as thin, short for truncated hemipenteract.
| 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] |
D6 Coxeter plane projection | |
| Schläfli symbol | t0,1{3,33,1} h2{4,34} |
| Coxeter-Dynkin diagram | |
| 5-faces | 76 |
| 4-faces | 636 |
| Cells | 2080 |
| Faces | 3200 |
| Edges | 2160 |
| Vertices | 480 |
| Vertex figure | ( )v[{ }x{3,3}] |
| Coxeter groups | D6, [33,1,1] |
The cantic 6-cube is sometimes referred to as thax, short for truncated hemihexeract.
| 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] |
{{cite journal}}: CS1 maint: untitled periodical (link)).| 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 | ||||||||||||