Polytope of Type {6,4,2,9}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {6,4,2,9}*864a
if this polytope has a name.
Group : SmallGroup(864,2462)
Rank : 5
Schlafli Type : {6,4,2,9}
Number of vertices, edges, etc : 6, 12, 4, 9, 9
Order of s₀s₁s₂s₃s₄ : 36
Order of s₀s₁s₂s₃s₄s₃s₂s₁ : 2
Special Properties :
   Degenerate
   Universal
   Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   {6,4,2,9,2} of size 1728
Vertex Figure Of :
   {2,6,4,2,9} of size 1728
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {6,2,2,9}*432
   3-fold quotients : {2,4,2,9}*288, {6,4,2,3}*288a
   4-fold quotients : {3,2,2,9}*216
   6-fold quotients : {2,2,2,9}*144, {6,2,2,3}*144
   9-fold quotients : {2,4,2,3}*96
   12-fold quotients : {3,2,2,3}*72
   18-fold quotients : {2,2,2,3}*48
Covers (Minimal Covers in Boldface) :
   2-fold covers : {12,4,2,9}*1728a, {6,8,2,9}*1728, {6,4,2,18}*1728a
Permutation Representation (GAP) :

s0 := ( 3, 4)( 6, 7)( 9,10)(11,12);;
s1 := ( 1, 3)( 2, 9)( 5, 6)( 7,10)( 8,11);;
s2 := ( 1, 2)( 3, 6)( 4, 7)( 5, 8)( 9,11)(10,12);;
s3 := (14,15)(16,17)(18,19)(20,21);;
s4 := (13,14)(15,16)(17,18)(19,20);;
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*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, 
s0*s1*s2*s1*s0*s1*s2*s1, s1*s2*s1*s2*s1*s2*s1*s2, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
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(21)!( 3, 4)( 6, 7)( 9,10)(11,12);
s1 := Sym(21)!( 1, 3)( 2, 9)( 5, 6)( 7,10)( 8,11);
s2 := Sym(21)!( 1, 2)( 3, 6)( 4, 7)( 5, 8)( 9,11)(10,12);
s3 := Sym(21)!(14,15)(16,17)(18,19)(20,21);
s4 := Sym(21)!(13,14)(15,16)(17,18)(19,20);
poly := sub<Sym(21)|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*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, s0*s1*s2*s1*s0*s1*s2*s1, 
s1*s2*s1*s2*s1*s2*s1*s2, s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4*s3*s4 >;

to this polytope