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by Ciro Santilli (@cirosantilli, 37)

Cross polytope

 ... Mathematics Area of mathematics Geometry Polytope Regular polytope Classification of regular polytopes
 0 By others on same topic  0 Discussions  Updated 2025-05-29  +Created 1970-01-01  See my version
Examples: square, octahedron.
Take (0,0,0,…,0) and flip one of 0's to ±1. Therefore has 2×D vertices.
Each edge E is linked to every other edge, except it's opposite -E.

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