Octagonal_antiprismatic_prism

Uniform antiprismatic prism

Uniform antiprismatic prism

4-D shape


In 4-dimensional geometry, a uniform antiprismatic prism or antiduoprism is a uniform 4-polytope with two uniform antiprism cells in two parallel 3-space hyperplanes, connected by uniform prisms cells between pairs of faces. The symmetry of a p-gonal antiprismatic prism is [2p,2+,2], order 8p.

Set of uniform antiprismatic prisms
TypePrismatic uniform 4-polytope
Schläfli symbols{2,p}×{}
Coxeter diagram
Cells2 p-gonal antiprisms,
2 p-gonal prisms and
2p triangular prisms
Faces4p {3}, 4p {4} and 4 {p}
Edges10p
Vertices4p
Vertex figure
Trapezoidal pyramid
Symmetry group[2p,2+,2], order 8p
[(p,2)+,2], order 4p
Propertiesconvex if the base is convex

A p-gonal antiprismatic prism or p-gonal antiduoprism has 2 p-gonal antiprism, 2 p-gonal prism, and 2p triangular prism cells. It has 4p equilateral triangle, 4p square and 4 regular p-gon faces. It has 10p edges, and 4p vertices.

Example 15-gonal antiprismatic prism

Schlegel diagram

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Convex uniform antiprismatic prisms

There is an infinite series of convex uniform antiprismatic prisms, starting with the digonal antiprismatic prism is a tetrahedral prism, with two of the tetrahedral cells degenerated into squares. The triangular antiprismatic prism is the first nondegenerate form, which is also an octahedral prism. The remainder are unique uniform 4-polytopes.

More information Name, s{2,2}×{} ...

Star antiprismatic prisms

There are also star forms following the set of star antiprisms, starting with the pentagram {5/2}:

More information Name, Coxeterdiagram ...

Square antiprismatic prism

More information Square antiprismatic prism ...

A square antiprismatic prism or square antiduoprism is a convex uniform 4-polytope. It is formed as two parallel square antiprisms connected by cubes and triangular prisms. The symmetry of a square antiprismatic prism is [8,2+,2], order 32. It has 16 triangle, 16 square and 4 square faces. It has 40 edges, and 16 vertices.

Square antiprismatic prism

Schlegel diagram

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Pentagonal antiprismatic prism

More information Pentagonal antiprismatic prism ...

A pentagonal antiprismatic prism or pentagonal antiduoprism is a convex uniform 4-polytope. It is formed as two parallel pentagonal antiprisms connected by cubes and triangular prisms. The symmetry of a pentagonal antiprismatic prism is [10,2+,2], order 40. It has 20 triangle, 20 square and 4 pentagonal faces. It has 50 edges, and 20 vertices.

Pentagonal antiprismatic prism

Schlegel diagram

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Hexagonal antiprismatic prism

More information Hexagonal antiprismatic prism ...

A hexagonal antiprismatic prism or hexagonal antiduoprism is a convex uniform 4-polytope. It is formed as two parallel hexagonal antiprisms connected by cubes and triangular prisms. The symmetry of a hexagonal antiprismatic prism is [12,2+,2], order 48. It has 24 triangle, 24 square and 4 hexagon faces. It has 60 edges, and 24 vertices.

Hexagonal antiprismatic prism

Schlegel diagram

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Heptagonal antiprismatic prism

More information Heptagonal antiprismatic prism ...

A heptagonal antiprismatic prism or heptagonal antiduoprism is a convex uniform 4-polytope. It is formed as two parallel heptagonal antiprisms connected by cubes and triangular prisms. The symmetry of a heptagonal antiprismatic prism is [14,2+,2], order 56. It has 28 triangle, 28 square and 4 heptagonal faces. It has 70 edges, and 28 vertices.

Heptagonal antiprismatic prism

Schlegel diagram

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Octagonal antiprismatic prism

More information Octagonal antiprismatic prism ...

A octagonal antiprismatic prism or octagonal antiduoprism is a convex uniform 4-polytope (four-dimensional polytope). It is formed as two parallel octagonal antiprisms connected by cubes and triangular prisms. The symmetry of an octagonal antiprismatic prism is [16,2+,2], order 64. It has 32 triangle, 32 square and 4 octagonal faces. It has 80 edges, and 32 vertices.

Octagonal antiprismatic prism

Schlegel diagram

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See also

References

  • John H. Conway, Heidi Burgiel, Chaim Goodman-Strauss, The Symmetries of Things 2008, ISBN 978-1-56881-220-5 (Chapter 26)
  • Norman Johnson Uniform Polytopes, Manuscript (1991)

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