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Polytope of Type {20,6,2}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {20,6,2}*960a
if this polytope has a name.
Group : SmallGroup(960,10886)
Rank : 4
Schlafli Type : {20,6,2}
Number of vertices, edges, etc : 40, 120, 12, 2
Order of s0s1s2s3 : 20
Order of s0s1s2s3s2s1 : 2
Special Properties :
   Degenerate
   Universal
   Non-Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   {20,6,2,2} of size 1920
Vertex Figure Of :
   {2,20,6,2} of size 1920
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {10,6,2}*480e
   4-fold quotients : {5,6,2}*240b, {10,3,2}*240a
   8-fold quotients : {5,3,2}*120
Covers (Minimal Covers in Boldface) :
   2-fold covers : {40,6,2}*1920d, {40,6,2}*1920e, {20,6,2}*1920c
Permutation Representation (GAP) :
s0 := (2,3)(6,7)(8,9);;
s1 := (1,2)(3,4)(5,6)(7,8);;
s2 := (6,9)(7,8);;
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, 
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2, 
s2*s1*s0*s1*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s0*s1*s0, 
s0*s2*s1*s2*s1*s2*s1*s0*s1*s0*s2*s1*s2*s1*s2*s1*s0*s1 ];;
poly := F / rels;;
 
Permutation Representation (Magma) :
s0 := Sym(11)!(2,3)(6,7)(8,9);
s1 := Sym(11)!(1,2)(3,4)(5,6)(7,8);
s2 := Sym(11)!(6,9)(7,8);
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, s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2, 
s2*s1*s0*s1*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s0*s1*s0, 
s0*s2*s1*s2*s1*s2*s1*s0*s1*s0*s2*s1*s2*s1*s2*s1*s0*s1 >; 
 

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