Part of the Atlas of Small Regular Polytopes

Polytope of Type {2,18,9,2}

Atlas Canonical Name {2,18,9,2}*1296

Overview

Group
SmallGroup(1296,1857)
Rank
5
Schläfli Type
{2,18,9,2}
Vertices, edges, …
2, 18, 81, 9, 2
Order of s0s1s2s3s4
18
Order of s0s1s2s3s4s3s2s1
2
Also known as
if this polytope has a name.

Special Properties

  • Degenerate
  • Universal
  • Orientable
  • Flat

Quotients maximal quotients in bold

3-fold

9-fold

27-fold

Covers minimal covers in bold

None in this atlas.

Representations

Permutation Representation (GAP) 
s0 := (1,2);;
s1 := ( 6, 9)( 7,10)( 8,11)(15,18)(16,19)(17,20)(24,27)(25,28)(26,29)(30,60)(31,61)(32,62)(33,57)(34,58)(35,59)(36,63)(37,64)(38,65)(39,69)(40,70)(41,71)(42,66)(43,67)(44,68)(45,72)(46,73)(47,74)(48,78)(49,79)(50,80)(51,75)(52,76)(53,77)(54,81)(55,82)(56,83);;
s2 := ( 3,30)( 4,32)( 5,31)( 6,36)( 7,38)( 8,37)( 9,33)(10,35)(11,34)(12,49)(13,48)(14,50)(15,55)(16,54)(17,56)(18,52)(19,51)(20,53)(21,40)(22,39)(23,41)(24,46)(25,45)(26,47)(27,43)(28,42)(29,44)(57,60)(58,62)(59,61)(64,65)(66,79)(67,78)(68,80)(69,76)(70,75)(71,77)(72,82)(73,81)(74,83);;
s3 := ( 3,12)( 4,14)( 5,13)( 6,18)( 7,20)( 8,19)( 9,15)(10,17)(11,16)(21,22)(24,28)(25,27)(26,29)(30,69)(31,71)(32,70)(33,66)(34,68)(35,67)(36,72)(37,74)(38,73)(39,60)(40,62)(41,61)(42,57)(43,59)(44,58)(45,63)(46,65)(47,64)(48,79)(49,78)(50,80)(51,76)(52,75)(53,77)(54,82)(55,81)(56,83);;
s4 := (84,85);;
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*s1*s0*s1, 
s0*s2*s0*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, s1*s2*s3*s1*s2*s1*s2*s3*s1*s2, 
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(85)!(1,2);
s1 := Sym(85)!( 6, 9)( 7,10)( 8,11)(15,18)(16,19)(17,20)(24,27)(25,28)(26,29)(30,60)(31,61)(32,62)(33,57)(34,58)(35,59)(36,63)(37,64)(38,65)(39,69)(40,70)(41,71)(42,66)(43,67)(44,68)(45,72)(46,73)(47,74)(48,78)(49,79)(50,80)(51,75)(52,76)(53,77)(54,81)(55,82)(56,83);
s2 := Sym(85)!( 3,30)( 4,32)( 5,31)( 6,36)( 7,38)( 8,37)( 9,33)(10,35)(11,34)(12,49)(13,48)(14,50)(15,55)(16,54)(17,56)(18,52)(19,51)(20,53)(21,40)(22,39)(23,41)(24,46)(25,45)(26,47)(27,43)(28,42)(29,44)(57,60)(58,62)(59,61)(64,65)(66,79)(67,78)(68,80)(69,76)(70,75)(71,77)(72,82)(73,81)(74,83);
s3 := Sym(85)!( 3,12)( 4,14)( 5,13)( 6,18)( 7,20)( 8,19)( 9,15)(10,17)(11,16)(21,22)(24,28)(25,27)(26,29)(30,69)(31,71)(32,70)(33,66)(34,68)(35,67)(36,72)(37,74)(38,73)(39,60)(40,62)(41,61)(42,57)(43,59)(44,58)(45,63)(46,65)(47,64)(48,79)(49,78)(50,80)(51,76)(52,75)(53,77)(54,82)(55,81)(56,83);
s4 := Sym(85)!(84,85);
poly := sub<Sym(85)|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*s1*s0*s1, s0*s2*s0*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, 
s1*s2*s3*s1*s2*s1*s2*s3*s1*s2, s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3 >;