Runcinated 5-cubes
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In five-dimensional
geometry Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...
, a runcinated 5-cube is a convex
uniform 5-polytope In geometry, a uniform 5-polytope is a five-dimensional uniform polytope. By definition, a uniform 5-polytope is vertex-transitive and constructed from uniform 4-polytope Facet (geometry), facets. The complete set of convex uniform 5-polytopes ...
that is a
runcination In geometry, runcination is an operation that cuts a regular polytope (or honeycomb) simultaneously along the faces, edges, and vertices, creating new facets in place of the original face, edge, and vertex centers. It is a higher order truncatio ...
(a 3rd order truncation) of the regular
5-cube In five-dimensional geometry, a 5-cube is a name for a five-dimensional hypercube with 32 vertices, 80 edges, 80 square faces, 40 cubic cells, and 10 tesseract 4-faces. It is represented by Schläfli symbol or , constructed as 3 tesseracts, ...
. There are 8 unique degrees of runcinations of the 5-cube, along with permutations of truncations and cantellations. Four are more simply constructed relative to the
5-orthoplex In five-dimensional geometry, a 5-orthoplex, or 5-cross polytope, is a five-dimensional polytope with 10 vertices, 40 edges, 80 triangle faces, 80 tetrahedron cells, 32 5-cell 4-faces. It has two constructed forms, the first being regular with ...
.


Runcinated 5-cube


Alternate names

* Small prismated penteract (Acronym: span) (Jonathan Bowers)


Coordinates

The Cartesian coordinates of the vertices of a ''runcinated 5-cube'' having edge length 2 are all permutations of: :\left(\pm1,\ \pm1,\ \pm1,\ \pm(1+\sqrt),\ \pm(1+\sqrt)\right)


Images





Runcitruncated 5-cube


Alternate names

* Runcitruncated penteract * Prismatotruncated penteract (Acronym: pattin) (Jonathan Bowers)


Construction and coordinates

The Cartesian coordinates of the vertices of a ''runcitruncated 5-cube'' having edge length 2 are all permutations of: :\left(\pm1,\ \pm(1+\sqrt),\ \pm(1+\sqrt),\ \pm(1+2\sqrt),\ \pm(1+2\sqrt)\right)


Images






Runcicantellated 5-cube


Alternate names

* Runcicantellated penteract * Prismatorhombated penteract (Acronym: prin) (Jonathan Bowers)


Coordinates

The Cartesian coordinates of the vertices of a ''runcicantellated 5-cube'' having edge length 2 are all permutations of: :\left(\pm1,\ \pm1,\ \pm(1+\sqrt),\ \pm(1+2\sqrt),\ \pm(1+2\sqrt)\right)


Images






Runcicantitruncated 5-cube


Alternate names

* Runcicantitruncated penteract * Biruncicantitruncated pentacross * great prismated penteract () (Jonathan Bowers)


Coordinates

The Cartesian coordinates of the vertices of a runcicantitruncated 5-cube having an edge length of 2 are given by all permutations of coordinates and sign of: :\left(1,\ 1+\sqrt,\ 1+2\sqrt,\ 1+3\sqrt,\ 1+3\sqrt\right)


Images


Related polytopes

These polytopes are a part of a set of 31 uniform polytera generated from the regular
5-cube In five-dimensional geometry, a 5-cube is a name for a five-dimensional hypercube with 32 vertices, 80 edges, 80 square faces, 40 cubic cells, and 10 tesseract 4-faces. It is represented by Schläfli symbol or , constructed as 3 tesseracts, ...
or
5-orthoplex In five-dimensional geometry, a 5-orthoplex, or 5-cross polytope, is a five-dimensional polytope with 10 vertices, 40 edges, 80 triangle faces, 80 tetrahedron cells, 32 5-cell 4-faces. It has two constructed forms, the first being regular with ...
.


References

*
H.S.M. Coxeter Harold Scott MacDonald "Donald" Coxeter, (9 February 1907 – 31 March 2003) was a British and later also Canadian geometer. He is regarded as one of the greatest geometers of the 20th century. Biography Coxeter was born in Kensington t ...
: ** H.S.M. Coxeter, ''Regular Polytopes'', 3rd Edition, Dover New York, 1973 ** Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by F. Arthur Sherk, Peter McMullen, Anthony C. Thompson, Asia Ivic Weiss, Wiley-Interscience Publication, 1995,

*** (Paper 22) H.S.M. Coxeter, ''Regular and Semi Regular Polytopes I'', ath. Zeit. 46 (1940) 380-407, MR 2,10*** (Paper 23) H.S.M. Coxeter, ''Regular and Semi-Regular Polytopes II'', ath. Zeit. 188 (1985) 559-591*** (Paper 24) H.S.M. Coxeter, ''Regular and Semi-Regular Polytopes III'', ath. Zeit. 200 (1988) 3-45* Norman Johnson ''Uniform Polytopes'', Manuscript (1991) ** N.W. Johnson: ''The Theory of Uniform Polytopes and Honeycombs'', Ph.D. * o3x3o3o4x - span, o3x3o3x4x - pattin, o3x3x3o4x - prin, o3x3x3x4x - gippin


External links

*
Polytopes of Various Dimensions
Jonathan Bowers *

(spid), Jonathan Bowers

{{Polytopes 5-polytopes