Polytope of Type {4,2,20,2}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {4,2,20,2}*640
if this polytope has a name.
Group : SmallGroup(640,19761)
Rank : 5
Schlafli Type : {4,2,20,2}
Number of vertices, edges, etc : 4, 4, 20, 20, 2
Order of s₀s₁s₂s₃s₄ : 20
Order of s₀s₁s₂s₃s₄s₃s₂s₁ : 2
Special Properties :
   Degenerate
   Universal
   Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   {4,2,20,2,2} of size 1280
   {4,2,20,2,3} of size 1920
Vertex Figure Of :
   {2,4,2,20,2} of size 1280
   {3,4,2,20,2} of size 1920
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {2,2,20,2}*320, {4,2,10,2}*320
   4-fold quotients : {4,2,5,2}*160, {2,2,10,2}*160
   5-fold quotients : {4,2,4,2}*128
   8-fold quotients : {2,2,5,2}*80
   10-fold quotients : {2,2,4,2}*64, {4,2,2,2}*64
   20-fold quotients : {2,2,2,2}*32
Covers (Minimal Covers in Boldface) :
   2-fold covers : {4,4,20,2}*1280, {4,2,20,4}*1280, {8,2,20,2}*1280, {4,2,40,2}*1280
   3-fold covers : {4,2,60,2}*1920, {4,2,20,6}*1920a, {4,6,20,2}*1920a, {12,2,20,2}*1920
Permutation Representation (GAP) :

s0 := (2,3);;
s1 := (1,2)(3,4);;
s2 := ( 6, 7)( 8, 9)(11,14)(12,13)(15,16)(17,18)(19,22)(20,21)(23,24);;
s3 := ( 5,11)( 6, 8)( 7,17)( 9,19)(10,13)(12,15)(14,23)(16,20)(18,21)(22,24);;
s4 := (25,26);;
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, 
s1*s2*s1*s2, s0*s3*s0*s3, s1*s3*s1*s3, 
s0*s4*s0*s4, s1*s4*s1*s4, s2*s4*s2*s4, 
s3*s4*s3*s4, s0*s1*s0*s1*s0*s1*s0*s1, 
s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3 ];;
poly := F / rels;;

Permutation Representation (Magma) :

s0 := Sym(26)!(2,3);
s1 := Sym(26)!(1,2)(3,4);
s2 := Sym(26)!( 6, 7)( 8, 9)(11,14)(12,13)(15,16)(17,18)(19,22)(20,21)(23,24);
s3 := Sym(26)!( 5,11)( 6, 8)( 7,17)( 9,19)(10,13)(12,15)(14,23)(16,20)(18,21)
(22,24);
s4 := Sym(26)!(25,26);
poly := sub<Sym(26)|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, s1*s2*s1*s2, 
s0*s3*s0*s3, s1*s3*s1*s3, s0*s4*s0*s4, 
s1*s4*s1*s4, s2*s4*s2*s4, s3*s4*s3*s4, 
s0*s1*s0*s1*s0*s1*s0*s1, s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3 >;

to this polytope