Acronym gikaike
Name great icosahedron atop icosahedron
Circumradius 1
Vertex figures
 ©,  ©
Face vector 24, 120, 160, 52
Confer
uniform relative:
sishi  
general polytopal classes:
segmentochora  

As abstract polytope gikaike is automorph, therby interchanging ike with gike.

Its vertex figures above are displayed to be edge-faceting of sidtid and therfore mere facetings of a v-scaled doe. Therfrom it becomes evident that this polychoron itself occurs as an edge-faceting within sishi.

It was found by Mecejide in early 2023. It further is notable because all its facets are regular polyhedra. And because all its faces moreover are triangles only, it even allows for rectification and truncation, then resulting in regikaike and tigikaike respectively.


Incidence matrix

gike || ike   → height = 1/2

12  * |  5  5  0 |  5 10  5  0 | 1  5  5 0 verf = stiscu
 * 12 |  0  5  5 |  0  5 10  5 | 0  5  5 1 verf = rapescu
------+----------+-------------+----------
 2  0 | 30  *  * |  2  2  0  0 | 1  2  1 0
 1  1 |  * 60  * |  0  2  2  0 | 0  2  2 0
 0  2 |  *  * 30 |  0  0  2  2 | 0  2  1 1
------+----------+-------------+----------
 3  0 |  3  0  0 | 20  *  *  * | 1  1  0 0
 2  1 |  1  2  0 |  * 60  *  * | 0  1  1 0
 1  2 |  0  2  1 |  *  * 60  * | 0  1  1 0
 0  3 |  0  0  3 |  *  *  * 20 | 0  1  0 1
------+----------+-------------+----------
12  0 | 30  0  0 | 20  0  0  0 | 1  *  * * gike
 3  3 |  3  6  3 |  1  3  3  1 | * 20  * * oct
 2  2 |  1  4  1 |  0  2  2  0 | *  * 30 * tet
 0 12 |  0  0 30 |  0  0  0 20 | *  *  * 1 ike

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