Two Quaternionic 4-Polytopes
Two Quaternionic 4-Polytopes
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两个四元数 4-多胞体
DOI:
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发表时间:
1981
期刊:
影响因子:
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通讯作者:
S. G. Hoggar
中科院分区:
文献类型:
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作者:
S. G. Hoggar
One property of a (convex) polytope in ℝ n is that the vertex set defines the actual subdivision into edges, triangles, etc. The cells (dimension n − 1) are the intersections of the convex hull of the vertices with its bounding hyperplanes. The cells intersect in (n − 2)-dimensional elements, and so on. All these are finite. But for a polytope in ℂ n convexity is not available; there is some latitude as to the various elements (now subspaces), subject to suitable conditions on their incidences. For example the fractional polytope ( frac{1}{3}gamma _3^3 ) and generalized cross polytope ( eta _3^3 ) [10] agree as to vertices and “edges,” but the first has 18 “triangles” whereas the second has 27.