In seven-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 hexicated 7-cube is a convex

uniform 7-polytope In seven-dimensional geometry, a 7-polytope is a polytope contained by 6-polytope facets. Each 5-polytope ridge being shared by exactly two 6-polytope facets. A uniform 7-polytope is one whose symmetry group is transitive on vertices and whose ...

, including 6th-order truncations (hexication) from the regular

7-cube In geometry, a 7-cube is a seven-dimensional hypercube with 128 vertices, 448 edges, 672 square faces, 560 cubic cells, 280 tesseract 4-faces, 84 penteract 5-faces, and 14 hexeract 6-faces. It can be named by its Schläfli symbol , being c ...

. There are 32 hexications for the 7-cube, including all permutations of truncations, cantellations, runcinations, sterications, and pentellations. 20 are represented here, while 12 are more easily constructed from the

7-orthoplex In geometry, a 7-orthoplex, or 7-cross polytope, is a regular 7-polytope with 14 Vertex (geometry), vertices, 84 Edge (geometry), edges, 280 triangle Face (geometry), faces, 560 tetrahedron Cell (mathematics), cells, 672 5-cells ''4-faces'', 448 ...

. The simple hexicated 7-cube is also called an expanded 7-cube, with only the first and last nodes ringed, is constructed by an

expansion Expansion may refer to: Arts, entertainment and media * ''L'Expansion'', a French monthly business magazine * ''Expansion'' (album), by American jazz pianist Dave Burrell, released in 2004 * ''Expansions'' (McCoy Tyner album), 1970 * ''Expansio ...

operation applied to the regular

. The highest form, the ''hexipentisteriruncicantitruncated 7-cube'' is more simply called a ''omnitruncated 7-cube'' with all of the nodes ringed. These polytope are among a family of 127

s with B₇ symmetry.

Hexicated 7-cube

In seven-dimensional

, a hexicated 7-cube is a convex

, a

hexication In geometry, a uniform polytope of dimension three or higher is a vertex-transitive polytope bounded by uniform facets. The uniform polytopes in two dimensions are the regular polygons (the definition is different in 2 dimensions to exclude vert ...

(6th order truncation) of the regular

, or alternately can be seen as an

Hexiruncicantellated 7-cube

In seven-dimensional

Omnitruncated 7-cube

The omnitruncated 7-cube is the largest uniform 7-polytope in the B₇ symmetry of the regular 7-cube. It can also be called the ''hexipentisteriruncicantitruncated 7-cube'' which is the long name for the omnitruncation for 7 dimensions, with all reflective mirrors active.

Alternate names

* Great petated hepteract (Acronym: ) (Jonathan Bowers)

Images

Notes

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'', PhD (1966) * x3o3o3o3o3o4x - , x3x3o3o3o3o3x- , x3o3o3x3o3o4x - , x3x3x3o3o3o4x - , x3x3o3x3o3o4x - , x3o3x3x3o3o4x - , x3o3x3o3o3x4x - , x3o3x3o3x3o4x - , x3x3o3o3o3x4x - , x3x3x3x3o3o4x - , x3x3x3o3x3o4x - , x3x3o3x3x3o4x - , x3o3x3x3x3o4x - , x3x3x3oxo3x4x - , x3x3x3x3x3o4x - , x3x3x3o3x3x4x - , x3x3o3x3x3x4x - , x3x3x3x3x3x4x -

External links

Polytopes of Various Dimensions

{{Polytopes 7-polytopes