octeract造句

• Applying an " alternation " operation, deleting alternating vertices of the octeract, creates another uniform polytope, called a " 8-demicube ", ( part of an infinite family called demihypercubes ), which has 16 demihepteractic and 128 8-simplex facets.
• There are two Coxeter groups associated with the 8-cube, one dual of the octeract with the C 8 or [ 4, 3, 3, 3, 3, 3, 3 ] symmetry group, and a half symmetry with two copies of 7-simplex facets, alternating, with the D 8 or [ 3 5, 1, 1 ] symmetry group . A lowest symmetry construction is based on a dual of an 8-orthotope, called an "'8-fusil " '.