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Polytope of Type {2,8,2,9}
This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {2,8,2,9}*576
if this polytope has a name.
Group : SmallGroup(576,1738)
Rank : 5
Schlafli Type : {2,8,2,9}
Number of vertices, edges, etc : 2, 8, 8, 9, 9
Order of s0s1s2s3s4 : 72
Order of s0s1s2s3s4s3s2s1 : 2
Special Properties :
Degenerate
Universal
Orientable
Flat
Related Polytopes :
Facet
Vertex Figure
Dual
Facet Of :
{2,8,2,9,2} of size 1152
Vertex Figure Of :
{2,2,8,2,9} of size 1152
{3,2,8,2,9} of size 1728
Quotients (Maximal Quotients in Boldface) :
2-fold quotients : {2,4,2,9}*288
3-fold quotients : {2,8,2,3}*192
4-fold quotients : {2,2,2,9}*144
6-fold quotients : {2,4,2,3}*96
12-fold quotients : {2,2,2,3}*48
Covers (Minimal Covers in Boldface) :
2-fold covers : {4,8,2,9}*1152a, {2,16,2,9}*1152, {2,8,2,18}*1152
3-fold covers : {2,8,2,27}*1728, {2,24,2,9}*1728, {6,8,2,9}*1728, {2,8,6,9}*1728
Permutation Representation (GAP) :
s0 := (1,2);;
s1 := (4,5)(6,7)(8,9);;
s2 := ( 3, 4)( 5, 6)( 7, 8)( 9,10);;
s3 := (12,13)(14,15)(16,17)(18,19);;
s4 := (11,12)(13,14)(15,16)(17,18);;
poly := Group([s0,s1,s2,s3,s4]);;
Finitely Presented Group Representation (GAP) :
F := FreeGroup("s0","s1","s2","s3","s4");;
s0 := F.1;; s1 := F.2;; s2 := F.3;; s3 := F.4;; s4 := F.5;;
rels := [ s0*s0, s1*s1, s2*s2, s3*s3, s4*s4, s0*s1*s0*s1,
s0*s2*s0*s2, s0*s3*s0*s3, s1*s3*s1*s3,
s2*s3*s2*s3, s0*s4*s0*s4, s1*s4*s1*s4,
s2*s4*s2*s4, s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2,
s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4 ];;
poly := F / rels;;
Permutation Representation (Magma) :
s0 := Sym(19)!(1,2);
s1 := Sym(19)!(4,5)(6,7)(8,9);
s2 := Sym(19)!( 3, 4)( 5, 6)( 7, 8)( 9,10);
s3 := Sym(19)!(12,13)(14,15)(16,17)(18,19);
s4 := Sym(19)!(11,12)(13,14)(15,16)(17,18);
poly := sub<Sym(19)|s0,s1,s2,s3,s4>;
Finitely Presented Group Representation (Magma) :
poly<s0,s1,s2,s3,s4> := Group< s0,s1,s2,s3,s4 | s0*s0, s1*s1, s2*s2,
s3*s3, s4*s4, s0*s1*s0*s1, s0*s2*s0*s2,
s0*s3*s0*s3, s1*s3*s1*s3, s2*s3*s2*s3,
s0*s4*s0*s4, s1*s4*s1*s4, s2*s4*s2*s4,
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2,
s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4 >;
to this polytope