This page is part of the Atlas of Small Regular Polytopes Atlas Canonical Name : {9,2,21}*756
if this polytope has a name. Group : SmallGroup(756,97) Rank : 4 Schlafli Type : {9,2,21} Number of vertices, edges, etc : 9, 9, 21, 21 Order of s0s1s2s3 : 63 Order of s0s1s2s3s2s1 : 2 Special Properties :
Degenerate
Universal
Orientable
Flat Related Polytopes : Facet Vertex Figure Dual Facet Of : {9,2,21,2} of size 1512 Vertex Figure Of : {2,9,2,21} of size 1512 Quotients (Maximal Quotients in Boldface) :
3-fold quotients : {9,2,7}*252, {3,2,21}*252
7-fold quotients : {9,2,3}*108
9-fold quotients : {3,2,7}*84
21-fold quotients : {3,2,3}*36 Covers (Minimal Covers in Boldface) :
2-fold covers : {9,2,42}*1512, {18,2,21}*1512 Permutation Representation (GAP) :