bn:01195266n
Noun Concept
Categories: 8-polytopes
EN
4 21 polytope  421  Birectified 4 21 polytope  Birectified dischiliahectohexaconta-myriaheptachiliadiacosioctaconta-zetton  Borfy
EN
In 8-dimensional geometry, the 421 is a semiregular uniform 8-polytope, constructed within the symmetry of the E8 group. Wikipedia
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