Polytope of Type {7,8}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {7,8}*336b
Also Known As : {7,8}₃. if this polytope has another name.
Group : SmallGroup(336,208)
Rank : 3
Schlafli Type : {7,8}
Number of vertices, edges, etc : 21, 84, 24
Order of s₀s₁s₂ : 3
Order of s₀s₁s₂s₁ : 6
Special Properties :
   Compact Hyperbolic Quotient
   Locally Spherical
   Non-Orientable
Related Polytopes :
   Facet
   Vertex Figure
   Dual
   Petrial
Facet Of :
   {7,8,2} of size 672
Vertex Figure Of :
   {2,7,8} of size 672
Quotients (Maximal Quotients in Boldface) :
   No Regular Quotients.
Covers (Minimal Covers in Boldface) :
   2-fold covers : {7,8}*672b, {14,8}*672c, {14,8}*672d
   3-fold covers : {21,8}*1008a
   4-fold covers : {28,8}*1344c, {28,8}*1344d, {7,16}*1344a, {14,8}*1344b
   5-fold covers : {35,8}*1680b
Permutation Representation (GAP) :

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

Finitely Presented Group Representation (GAP) :

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

Permutation Representation (Magma) :

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

Finitely Presented Group Representation (Magma) :

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

References : None.
to this polytope