Truncated 7-cubes explained

In seven-dimensional geometry, a truncated 7-cube is a convex uniform 7-polytope, being a truncation of the regular 7-cube.

There are 6 truncations for the 7-cube. Vertices of the truncated 7-cube are located as pairs on the edge of the 7-cube. Vertices of the bitruncated 7-cube are located on the square faces of the 7-cube. Vertices of the tritruncated 7-cube are located inside the cubic cells of the 7-cube. The final three truncations are best expressed relative to the 7-orthoplex.

Truncated 7-cube

bgcolor=#e7dcc3 colspan=2Truncated 7-cube
Typeuniform 7-polytope
Schläfli symbolt
Coxeter-Dynkin diagrams
6-faces
5-faces
4-faces
Cells
Faces
Edges3136
Vertices896
Vertex figureElongated 5-simplex pyramid
Coxeter groupsB7, [3<sup>5</sup>,4]
Propertiesconvex

Alternate names

Coordinates

Cartesian coordinates for the vertices of a truncated 7-cube, centered at the origin, are all sign and coordinate permutations of

(1,1+√2,1+√2,1+√2,1+√2,1+√2,1+√2)

Related polytopes

The truncated 7-cube, is sixth in a sequence of truncated hypercubes:

Bitruncated 7-cube

bgcolor=#e7dcc3 colspan=2Bitruncated 7-cube
Typeuniform 7-polytope
Schläfli symbol2t
Coxeter-Dynkin diagrams
6-faces
5-faces
4-faces
Cells
Faces
Edges9408
Vertices2688
Vertex figurev
Coxeter groupsB7, [3<sup>5</sup>,4]
D7, [3<sup>4,1,1</sup>]
Propertiesconvex

Alternate names

Coordinates

Cartesian coordinates for the vertices of a bitruncated 7-cube, centered at the origin, are all sign and coordinate permutations of

(±2,±2,±2,±2,±2,±1,0)

Related polytopes

The bitruncated 7-cube is fifth in a sequence of bitruncated hypercubes:

Tritruncated 7-cube

bgcolor=#e7dcc3 colspan=2Tritruncated 7-cube
Typeuniform 7-polytope
Schläfli symbol3t
Coxeter-Dynkin diagrams
6-faces
5-faces
4-faces
Cells
Faces
Edges13440
Vertices3360
Vertex figurev
Coxeter groupsB7, [3<sup>5</sup>,4]
D7, [3<sup>4,1,1</sup>]
Propertiesconvex

Alternate names

Coordinates

Cartesian coordinates for the vertices of a tritruncated 7-cube, centered at the origin, are all sign and coordinate permutations of

(±2,±2,±2,±2,±1,0,0)

Images

References

External links

Notes and References

  1. Klitizing (x3x3o3o3o3o4o - taz)
  2. Klitizing (o3x3x3o3o3o4o - botaz)
  3. Klitizing (o3o3x3x3o3o4o - totaz)