Acronym | bobipyr |
Name |
bowtie bipyramid, crossed-square bipyramid, bowtie (line-)tegum |
Circumradius | 1/sqrt(2) = 0.707107 |
General of army | oct |
Dihedral angles |
|
Face vector | 6, 10, 6 |
Confer |
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External links |
This non-convex scaliform polyhedron is an only briquet symmetrical ridge-faceting of the oct. In fact, similar as thah is derived by all 3 internal squares and squippy by only 1 internal square, bobipyr is obtained by using 2 internal squares instead.
The second incidence matrix below shows that bobipyr, taken as an abstract polyhedron, would be self-dual.
Incidence matrix according to Dynkin symbol
oxo(-x)&#xr o... & | 2 * | 4 0 | 2 2 .o.. & | * 4 | 2 1 | 2 1 -----------+-----+-----+---- oo..&#x & | 1 1 | 8 * | 1 1 .x.. & | 0 2 | * 2 | 2 0 -----------+-----+-----+---- ox..&#x & | 1 2 | 2 1 | 4 * oooo&#xr | 2 2 | 4 0 | * 2
pt || xq(-x)q || pt → height = 1/sqrt(2) = 0.707107 1 * * | 4 0 0 | 2 2 0 * 4 * | 1 1 1 | 1 1 1 * * 1 | 0 0 4 | 0 2 2 ------+-------+------ 1 1 0 | 4 * * | 1 1 0 0 2 0 | * 2 * | 1 0 1 0 1 1 | * * 4 | 0 1 1 ------+-------+------ 1 2 0 | 2 1 0 | 2 * * 1 2 1 | 2 0 2 | * 2 * 0 2 1 | 0 1 2 | * * 2
or 2 * | 4 0 | 2 2 * 4 | 2 1 | 2 1 ----+-----+---- 1 1 | 8 * | 1 1 0 2 | * 2 | 2 0 ----+-----+---- 1 2 | 2 1 | 4 * 2 2 | 4 0 | * 2
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