Part of the Atlas of Small Regular Polytopes

Polytope of Type {4,42,2}

Atlas Canonical Name {4,42,2}*672a

Overview

Group
SmallGroup(672,1237)
Rank
4
Schläfli Type
{4,42,2}
Vertices, edges, …
4, 84, 42, 2
Order of s0s1s2s3
84
Order of s0s1s2s3s2s1
2
Also known as
if this polytope has a name.

Special Properties

  • Degenerate
  • Universal
  • Orientable
  • Flat

Quotients maximal quotients in bold

2-fold

3-fold

4-fold

6-fold

7-fold

12-fold

14-fold

21-fold

28-fold

42-fold

Covers minimal covers in bold

2-fold

Representations

Permutation Representation (GAP)
s0 := (43,64)(44,65)(45,66)(46,67)(47,68)(48,69)(49,70)(50,71)(51,72)(52,73)(53,74)(54,75)(55,76)(56,77)(57,78)(58,79)(59,80)(60,81)(61,82)(62,83)(63,84);;
s1 := ( 1,43)( 2,49)( 3,48)( 4,47)( 5,46)( 6,45)( 7,44)( 8,57)( 9,63)(10,62)(11,61)(12,60)(13,59)(14,58)(15,50)(16,56)(17,55)(18,54)(19,53)(20,52)(21,51)(22,64)(23,70)(24,69)(25,68)(26,67)(27,66)(28,65)(29,78)(30,84)(31,83)(32,82)(33,81)(34,80)(35,79)(36,71)(37,77)(38,76)(39,75)(40,74)(41,73)(42,72);;
s2 := ( 1, 9)( 2, 8)( 3,14)( 4,13)( 5,12)( 6,11)( 7,10)(15,16)(17,21)(18,20)(22,30)(23,29)(24,35)(25,34)(26,33)(27,32)(28,31)(36,37)(38,42)(39,41)(43,51)(44,50)(45,56)(46,55)(47,54)(48,53)(49,52)(57,58)(59,63)(60,62)(64,72)(65,71)(66,77)(67,76)(68,75)(69,74)(70,73)(78,79)(80,84)(81,83);;
s3 := (85,86);;
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*s2*s1*s0*s1*s2*s1, 
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2 ];;
poly := F / rels;;
Permutation Representation (Magma)
s0 := Sym(86)!(43,64)(44,65)(45,66)(46,67)(47,68)(48,69)(49,70)(50,71)(51,72)(52,73)(53,74)(54,75)(55,76)(56,77)(57,78)(58,79)(59,80)(60,81)(61,82)(62,83)(63,84);
s1 := Sym(86)!( 1,43)( 2,49)( 3,48)( 4,47)( 5,46)( 6,45)( 7,44)( 8,57)( 9,63)(10,62)(11,61)(12,60)(13,59)(14,58)(15,50)(16,56)(17,55)(18,54)(19,53)(20,52)(21,51)(22,64)(23,70)(24,69)(25,68)(26,67)(27,66)(28,65)(29,78)(30,84)(31,83)(32,82)(33,81)(34,80)(35,79)(36,71)(37,77)(38,76)(39,75)(40,74)(41,73)(42,72);
s2 := Sym(86)!( 1, 9)( 2, 8)( 3,14)( 4,13)( 5,12)( 6,11)( 7,10)(15,16)(17,21)(18,20)(22,30)(23,29)(24,35)(25,34)(26,33)(27,32)(28,31)(36,37)(38,42)(39,41)(43,51)(44,50)(45,56)(46,55)(47,54)(48,53)(49,52)(57,58)(59,63)(60,62)(64,72)(65,71)(66,77)(67,76)(68,75)(69,74)(70,73)(78,79)(80,84)(81,83);
s3 := Sym(86)!(85,86);
poly := sub<Sym(86)|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*s2*s1*s0*s1*s2*s1, s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2 >;