Cantellated 5-demicube

5-cube	Cantellated 5-demicube	Cantitruncated 5-demicube
Orthogonal projections in D5 Coxeter plane

In six-dimensional geometry, a cantellated 5-demicube is a convex uniform 5-polytope, being a cantellation of the uniform 5-demicube.

There are 2 unique cantellation for the 5-demicube including a truncation.

Contents 1 Cantellated 5-demicube 1.1 Alternate names 1.2 Cartesian coordinates 1.3 Images 2 Cantitruncated 5-demicube 2.1 Alternate names 2.2 Cartesian coordinates 2.3 Images 3 Related polytopes 4 Notes 5 References 6 External links

Cantellated 5-demicube

Cantellated 5-demicube
Type	uniform polyteron
Schläfli symbol	t0,2{3,32,1}
Coxeter-Dynkin diagram
4-faces	42
Cells	360
Faces	880
Edges	720
Vertices	160
Vertex figure
Coxeter groups	D5, [32,1,1]
Properties	convex

Alternate names

• Small rhombated hemipenteract (sirhin) (Jonathan Bowers)^[1]

Cartesian coordinates

The Cartesian coordinates for the 960 vertices of a cantellated demipenteract centered at the origin are coordinate permutations:

(±1,±1,±1,±3,±3)

with an odd number of plus signs.

Images

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]

Cantitruncated 5-demicube

Cantitruncated 5-demicube
Type	uniform polyteron
Schläfli symbol	t0,1,2{3,32,1}
Coxeter-Dynkin diagram
4-faces	42
Cells	360
Faces	1040
Edges	1200
Vertices	480
Vertex figure
Coxeter groups	D5, [32,1,1]
Properties	convex

Alternate names

• Great rhombated hemipenteract (girhin) (Jonathan Bowers)^[2]

Cartesian coordinates

The Cartesian coordinates for the 480 vertices of a cantitruncated demipenteract centered at the origin are coordinate permutations:

(±1,±1,±3,±5,±5)

with an odd number of plus signs.

Images

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]

Related polytopes

This polytope is based on the 5-demicube, a part of a dimensional family of uniform polytopes called demihypercubes for being alternation of the hypercube family.

There are 23 uniform polytera (uniform 5-polytope) that can be constructed from the D₅ symmetry of the 5-demicube, of which are unique to this family, and 15 are shared within the 5-cube family.

t0(121)

t0,1(121)

t0,2(121)

t0,3(121)

t0,1,2(121)

t0,1,3(121)

t0,2,3(121)

t0,1,2,3(121)

Notes

References

• H.S.M. Coxeter:
  • H.S.M. Coxeter, Regular Polytopes, 3rd Edition, Dover New York, 1973
  • Kaleidoscopes: Selected Writings of H.S.M. Coxeter, editied 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]
    • (Paper 23) H.S.M. Coxeter, Regular and Semi-Regular Polytopes II, [Math. Zeit. 188 (1985) 559-591]
    • (Paper 24) H.S.M. Coxeter, Regular and Semi-Regular Polytopes III, [Math. Zeit. 200 (1988) 3-45]
• Norman Johnson Uniform Polytopes, Manuscript (1991)
  • N.W. Johnson: The Theory of Uniform Polytopes and Honeycombs, Ph.D.
• Richard Klitzing, 5D, uniform polytopes (polytera) x3o3o *b3x3o - sirhin, x3x3o *b3x3o - girhin

External links

• Weisstein, Eric W., "Hypercube" from MathWorld.
• Olshevsky, George, Measure polytope at Glossary for Hyperspace.
• Polytopes of Various Dimensions
• Multi-dimensional Glossary

Family	An	BCn	Dn	E6 / E7 / E8 / F4 / G2	Hn
Regular polygon	Triangle	Square		Hexagon	Pentagon
Uniform polyhedron	Tetrahedron	Octahedron • Cube	Demicube		Dodecahedron • Icosahedron
Uniform polychoron	5-cell	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 9-polytope	9-simplex	9-orthoplex • 9-cube	9-demicube
Uniform 10-polytope	10-simplex	10-orthoplex • 10-cube	10-demicube
n-polytopes	n-simplex	n-orthoplex • n-cube	n-demicube	1k2 • 2k1 • k21	pentagonal polytope
Topics: Polytope families • Regular polytope • List of regular polytopes