Acronym | cid |
Name |
small complex icosidodecahedron, (as type C:) complex polyhedron x2-3-o2-5-o2 |
Circumradius | sqrt[(5+sqrt(5))/8] = 0.951057 |
Vertex figure |
[(3/2,5)5] (type A) or [(3,5)5]/3 (type B) |
Snub derivation |
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General of army | ike |
Colonel of regiment | ike |
Confer |
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External links |
As abstract polytope cid is isomorphic to gacid, thereby replacing pentagons by pentagrams.
Looks like a compound of the icosahedron (ike) and the great dodecahedron (gad), and indeed edges coincide by pairs, but vertices are identified. Note that without edge-doubling it would be a tetradic figure (type C). – Moreover it also could be taken, as Quickfur pointed out in 2022, as a different compound as well: the chiral-tetrahedrally symmetric compound of 4 teddi (type D). Then however icosahedral edges fall into 2 classes of coincident edges: either 2 incident 3-5 edges or an incident pair of a 3-3 and a 5-5 edge.
Through the replacement of normal pentagons by complete pentagons (-x)5f, i.e. additional f-edges, this same set of faces provides an even further type E. Vertices coincide by 5 then, x-edges by pairs.
Incidence matrix according to Dynkin symbol
x3/2o5o5*a (type A) . . . | 12 | 10 | 5 5 -----------+----+----+------ x . . | 2 | 60 | 1 1 -----------+----+----+------ x3/2o . | 3 | 3 | 20 * x . o5*a | 5 | 5 | * 12
o5/3o3x5*a (type B) . . . | 12 | 10 | 5 5 -----------+----+----+------ . . x | 2 | 60 | 1 1 -----------+----+----+------ . o3x | 3 | 3 | 20 * o . x5*a | 5 | 5 | * 12
x3/2o5/2o5*a (type B) . . . | 12 | 10 | 5 5 -------------+----+----+------ x . . | 2 | 60 | 1 1 -------------+----+----+------ x3/2o . | 3 | 3 | 20 * x . o5*a | 5 | 5 | * 12
o5/4x3o5*a (type A) . . . | 12 | 10 | 5 5 --------+----+----+------ . x . | 2 | 60 | 1 1 --------+----+----+------ o5/4x . | 5 | 5 | 12 * . x3o | 3 | 3 | * 20
o5/4o3x5*a (type A) . . . | 12 | 10 | 5 5 -----------+----+----+------ . . x | 2 | 60 | 1 1 -----------+----+----+------ . o3x | 3 | 3 | 20 * o . x5*a | 5 | 5 | * 12
x5/4o5/2o3*a (type B) . . . | 12 | 10 | 5 5 -------------+----+----+------ x . . | 2 | 60 | 1 1 -------------+----+----+------ x5/4o . | 5 | 5 | 12 * x . o3*a | 3 | 3 | * 20
o5/4x3/2o5/3*a (type B) . . . | 12 | 10 | 5 5 ----------+----+----+------ . x . | 2 | 60 | 1 1 ----------+----+----+------ o5/4x . | 5 | 5 | 12 * . x3/2o | 3 | 3 | * 20
x5/4o5/4o3/2*a (type A) . . . | 12 | 10 | 5 5 ---------------+----+----+------ x . . | 2 | 60 | 1 1 ---------------+----+----+------ x5/4o . | 5 | 5 | 12 * x . o3/2*a | 3 | 3 | * 20
β3o5o (type A) both( . . . ) | 12 | 10 | 5 5 --------------+----+----+------ sefa( β3o . ) | 2 | 60 | 1 1 --------------+----+----+------ β3o . ♦ 3 | 3 | 20 * sefa( β3o5o ) | 5 | 5 | * 12 starting figure: x3o5o
(Type C) 12 | 5 | 5 5 ---+----+------ 2 | 30 | 2 2 :4 incident faces ---+----+------ 3 | 3 | 20 * 5 | 5 | * 12
as uniform compound 12 | 5 5 | 5 5 || 1 1 -----+-------+-------++---- 2 | 30 * | 2 0 || 1 0 2 | * 30 | 0 2 || 0 1 -----+-------+-------++---- 3 | 3 0 | 20 * || 1 0 5 | 0 5 | * 12 || 0 1 -----+-------+-------++---- ♦ 12 | 30 0 | 20 0 || 1 * ♦ 12 | 0 30 | 0 20 || * 1
as chiral-tetrahedrally symmetrical compound (type D) 12 | 2 4 2 2 | 1 3 5 1 || 3 ----+-------------+-----------++-- 2 | 12 * * * | 1 1 0 0 || 1 2 | * 24 * * | 0 1 1 0 || 1 2 | * * 12 * | 0 0 2 0 || 1 2 | * * * 12 | 0 0 1 1 || 1 ----+-------------+-----------++-- 3 | 3 0 0 0 | 4 * * * || 1 3 | 1 2 0 0 | * 12 * * || 1 5 | 0 2 2 1 | * * 12 * || 1 3 | 0 0 0 3 | * * * 4 || 1 ----+-------------+-----------++-- ♦ 9 | 3 6 3 3 | 1 3 3 1 || 4
o3(-x)5f (Type E) . . . | 60 | 2 1 | 1 2 ---------+----+-------+------ . -x . | 2 | 60 * | 1 1 . . f | 2 | * 30 | 0 2 ---------+----+-------+------ o3(-x) . | 3 | 3 0 | 20 * . (-x)5f | 10 | 5 5 | * 12
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