Polytope of Type {6,20,2}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {6,20,2}*960b
if this polytope has a name.
Group : SmallGroup(960,10886)
Rank : 4
Schlafli Type : {6,20,2}
Number of vertices, edges, etc : 12, 120, 40, 2
Order of s₀s₁s₂s₃ : 20
Order of s₀s₁s₂s₃s₂s₁ : 2
Special Properties :
   Degenerate
   Universal
   Non-Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   {6,20,2,2} of size 1920
Vertex Figure Of :
   {2,6,20,2} of size 1920
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {6,10,2}*480c
   4-fold quotients : {3,10,2}*240b, {6,5,2}*240c
   8-fold quotients : {3,5,2}*120
Covers (Minimal Covers in Boldface) :
   2-fold covers : {6,20,4}*1920e, {6,20,2}*1920c
Permutation Representation (GAP) :

s0 := (1,4)(2,3)(6,7)(8,9);;
s1 := (2,3)(5,6)(8,9);;
s2 := (1,2)(3,4)(6,8)(7,9);;
s3 := (10,11);;
poly := Group([s0,s1,s2,s3]);;

Finitely Presented Group Representation (GAP) :

F := FreeGroup("s0","s1","s2","s3");;
s0 := F.1;;  s1 := F.2;;  s2 := F.3;;  s3 := F.4;;  
rels := [ s0*s0, s1*s1, s2*s2, s3*s3, s0*s2*s0*s2, 
s0*s3*s0*s3, s1*s3*s1*s3, s2*s3*s2*s3, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s2*s1*s2*s0*s1*s2*s1*s2*s0*s1*s2*s1*s2, 
s2*s0*s1*s2*s1*s0*s1*s0*s1*s0*s2*s1*s2*s1*s0*s1*s0*s1 ];;
poly := F / rels;;

Permutation Representation (Magma) :

s0 := Sym(11)!(1,4)(2,3)(6,7)(8,9);
s1 := Sym(11)!(2,3)(5,6)(8,9);
s2 := Sym(11)!(1,2)(3,4)(6,8)(7,9);
s3 := Sym(11)!(10,11);
poly := sub<Sym(11)|s0,s1,s2,s3>;

Finitely Presented Group Representation (Magma) :

poly<s0,s1,s2,s3> := Group< s0,s1,s2,s3 | s0*s0, s1*s1, s2*s2, 
s3*s3, s0*s2*s0*s2, s0*s3*s0*s3, s1*s3*s1*s3, 
s2*s3*s2*s3, s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s2*s1*s2*s0*s1*s2*s1*s2*s0*s1*s2*s1*s2, 
s2*s0*s1*s2*s1*s0*s1*s0*s1*s0*s2*s1*s2*s1*s0*s1*s0*s1 >;

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