Talk:Icosahedral bipyramid
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One of the 5 convex 4-deltatopes
[edit]It is one of the 5 convex 4-deltatopes, as mentioned here [1], the other four being three of the regular 4-polytopes and the tetrahedral bipyramid. This one and 600-cell are the only two among the 5 that don't have a higher-dimensional analog. 129.104.241.25 (talk) 01:08, 12 October 2023 (UTC)
The symmetry group
[edit]It should be noted that the symmetry group of the icosahedral bipyramid is the direct product of the symmetry group of the icosahedral (A5×C2 = SmallGroup(120,35)) and the cyclic group of order 2, being isomorphic to A5×C2×C2 = SmallGroup(240,190). 129.104.241.25 (talk) 08:30, 12 October 2023 (UTC)