In geometry, the grand antiprism or pentagonal double antiprismoid is a uniform polychoron (4-dimensional uniform polytope) bounded by 320 cells: 20 pentagonal antiprisms, and 300 tetrahedra. It is an anomalous, non-Wythoffian uniform polychoron, discovered in 1965 by Conway and Guy.
Read more about Grand Antiprism: Alternate Names, Structure, Vertex Figure, Construction, Projections
Famous quotes containing the word grand:
“If the Christ were content with humble toilers for disciples, that wasn’t good enough for our Bert. He wanted dukes’ half sisters and belted earls wiping his feet with their hair; grand apotheosis of the snob, to humiliate the objects of his own awe by making them venerate him.”
—Angela Carter (1940–1992)