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5 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The concept of a regular polyhedron of index two was introduced in Wills for orientable polyhedra with planar faces. There are exactly 5 such polyhedra. [Post]
Submitted: 2010-05-27 00:48:56; Last Modified: 2010-05-27 05:58:32.
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