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s |- |bgcolor=#e7dcc3|Coxeter diagram|| = |- |bgcolor=#e7dcc3|7-faces||144: 16 128 |- |bgcolor=#e7dcc3|6-faces||112 1024 |- |bgcolor=#e7dcc3|5-faces||448 3584 |- |bgcolor=#e7dcc3|4-faces||1120 7168 |- |bgcolor=#e7dcc3|Cells||10752: 1792 8960 |- |bgcolor=#e7dcc3|Faces||7168 |- |bgcolor=#e7dcc3|Edges||1792 |- |bgcolor=#e7dcc3|Vertices||128 |- |bgcolor=#e7dcc3|Vertex figure||Rectified 7-simplex 40px |- |bgcolor=#e7dcc3|Symmetry group||D8, () = () A18, ()+ |- |bgcolor=#e7dcc3|Dual||? |- |bgcolor=#e7dcc3|Properties||convex |} In geometry, a demiocteract or 8-demicube is a uniform 8-polytope, constructed from the 8-hypercube, octeract, with alternated vertices truncated. 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 HM8 for an 8-dimensional ''half measure'' polytope. Coxeter named this polytope as 151 from its Coxeter diagram, with a ring on one of the 1-length branches, and Schläfli symbol or . == Cartesian coordinates == Cartesian coordinates for the vertices of an 8-demicube centered at the origin are alternate halves of the 8-cube: : (±1,±1,±1,±1,±1,±1,±1,±1) with an odd number of plus signs. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「8-demicube」の詳細全文を読む スポンサード リンク
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