3-8 duoprism

Uniform 3-8 duoprisms 140px Schlegel diagrams
Type	Prismatic uniform polychoron
Schläfli symbol	{3}×{8} {3}×t{4}
Coxeter diagram
Cells	3 octagonal prisms, 8 triangular prisms
Faces	24 squares, 3 octagons, 8 triangles
Edges	48
Vertices	24
Vertex figure	Digonal disphenoid
Symmetry	[3,2,8], order 48
Dual	3-8 duopyramid
Properties	convex, vertex-uniform

In geometry of 4 dimensions, a 3-8 duoprism, a duoprism and 4-polytope resulting from the Cartesian product of a triangle and an octagon.

The 3-8 duoprism exists in some of the uniform 5-polytopes in the B5 family.

Images

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3-8 duopyramid

3-8 duopyramid
Type	duopyramid
Schläfli symbol	{3}+{8} {3}+t{4}
Coxeter-Dynkin diagram
Cells	24 digonal disphenoids
Faces	48 isosceles triangles
Edges	35 (24+3+8)
Vertices	11 (3+8)
Symmetry	[3,2,8], order 48
Dual	3-8 duoprism
Properties	convex, facet-transitive

The dual of a 3-8 duoprism is called a 3-8 duopyramid. It has 24 digonal disphenoid cells, 48 isosceles triangular faces, 35 edges, and 11 vertices.

Orthogonal projection

See also

• Polytope and polychoron
• Convex regular polychoron
• Duocylinder
• Tesseract

References

• Regular Polytopes, H. S. M. Coxeter, Dover Publications, Inc., 1973, New York, p. 124.
• Coxeter, The Beauty of Geometry: Twelve Essays, Dover Publications, 1999, ISBN:0-486-40919-8 (Chapter 5: Regular Skew Polyhedra in three and four dimensions and their topological analogues)
  • Coxeter, H. S. M. Regular Skew Polyhedra in Three and Four Dimensions. Proc. London Math. Soc. 43, 33–62, 1937.
• John H. Conway, Heidi Burgiel, Chaim Goodman-Strass, The Symmetries of Things 2008, ISBN:978-1-56881-220-5 (Chapter 26)
• Norman Johnson Uniform Polytopes, Manuscript (1991)
  • N. W. Johnson: The Theory of Uniform Polytopes and Honeycombs, Ph.D. Dissertation, University of Toronto, 1966
• Catalogue of Convex Polychora, section 6, George Olshevsky.

External links

• The Fourth Dimension Simply Explained—describes duoprisms as "double prisms" and duocylinders as "double cylinders"
• Polygloss – glossary of higher-dimensional terms
• Exploring Hyperspace with the Geometric Product