Demidekeract (10-demicube) | ||
---|---|---|
Petrie polygon projection | ||
Type | Uniform 10-polytope | |
Family | demihypercube | |
Coxeter symbol | 171 | |
Schläfli symbol | {31,7,1} h{4,38} s{21,1,1,1,1,1,1,1,1} | |
Coxeter diagram | = | |
9-faces | 532 | 20 {31,6,1} 512 {38} |
8-faces | 5300 | 180 {31,5,1} 5120 {37} |
7-faces | 24000 | 960 {31,4,1} 23040 {36} |
6-faces | 64800 | 3360 {31,3,1} 61440 {35} |
5-faces | 115584 | 8064 {31,2,1} 107520 {34} |
4-faces | 142464 | 13440 {31,1,1} 129024 {33} |
Cells | 122880 | 15360 {31,0,1} 107520 {3,3} |
Faces | 61440 | {3} |
Edges | 11520 | |
Vertices | 512 | |
Vertex figure | Rectified 9-simplex | |
Symmetry group | D10, [37,1,1] = [1+,4,38] [29]+ | |
Dual | ? | |
Properties | convex |
In geometry, a 10-demicube or demidekeract is a uniform 10-polytope, constructed from the 10-cube with alternated vertices removed. It is part of a dimensionally infinite family of uniform polytopes called demihypercubes.
E. L. Elte identified it in 1912 as a semiregular polytope, labeling it as HM10 for a ten-dimensional half measure polytope.
Coxeter named this polytope as 171 from its Coxeter diagram, with a ring on one of the 1-length branches, and Schläfli symbol or {3,37,1}.
Cartesian coordinates for the vertices of a demidekeract centered at the origin are alternate halves of the dekeract:
with an odd number of plus signs.
B10 coxeter plane |
D10 coxeter plane (Vertices are colored by multiplicity: red, orange, yellow, green = 1,2,4,8) |
A regular dodecahedron can be embedded as a regular skew polyhedron within the vertices in the 10-demicube, possessing the same symmetries as the 3-dimensional dodecahedron.[1]