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Polytope of Type {2,6,18}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {2,6,18}*1944a
if this polytope has a name.
Group : SmallGroup(1944,943)
Rank : 4
Schlafli Type : {2,6,18}
Number of vertices, edges, etc : 2, 27, 243, 81
Order of s0s1s2s3 : 18
Order of s0s1s2s3s2s1 : 2
Special Properties :
   Degenerate
   Universal
   Non-Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   None in this Atlas
Vertex Figure Of :
   None in this Atlas
Quotients (Maximal Quotients in Boldface) :
   3-fold quotients : {2,6,6}*648a, {2,6,18}*648b
   9-fold quotients : {2,6,6}*216
Covers (Minimal Covers in Boldface) :
   None in this atlas.
Permutation Representation (GAP) :
s0 := (1,2);;
s1 := ( 6, 9)( 7,10)( 8,11)(12,22)(13,23)(14,21)(15,28)(16,29)(17,27)(18,25)
(19,26)(20,24)(33,36)(34,37)(35,38)(39,49)(40,50)(41,48)(42,55)(43,56)(44,54)
(45,52)(46,53)(47,51)(60,63)(61,64)(62,65)(66,76)(67,77)(68,75)(69,82)(70,83)
(71,81)(72,79)(73,80)(74,78);;
s2 := ( 4, 5)( 6, 9)( 7,11)( 8,10)(12,18)(13,20)(14,19)(16,17)(21,24)(22,26)
(23,25)(28,29)(30,80)(31,79)(32,78)(33,77)(34,76)(35,75)(36,83)(37,82)(38,81)
(39,59)(40,58)(41,57)(42,65)(43,64)(44,63)(45,62)(46,61)(47,60)(48,74)(49,73)
(50,72)(51,71)(52,70)(53,69)(54,68)(55,67)(56,66);;
s3 := ( 3,30)( 4,32)( 5,31)( 6,33)( 7,35)( 8,34)( 9,36)(10,38)(11,37)(12,48)
(13,50)(14,49)(15,51)(16,53)(17,52)(18,54)(19,56)(20,55)(21,39)(22,41)(23,40)
(24,42)(25,44)(26,43)(27,45)(28,47)(29,46)(57,59)(60,62)(63,65)(66,77)(67,76)
(68,75)(69,80)(70,79)(71,78)(72,83)(73,82)(74,81);;
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*s1*s0*s1, 
s0*s2*s0*s2, s0*s3*s0*s3, s1*s3*s1*s3, 
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2, 
s3*s2*s1*s2*s1*s2*s3*s2*s3*s2*s1*s2*s3*s2*s1*s2*s3*s2*s1 ];;
poly := F / rels;;
 
Permutation Representation (Magma) :
s0 := Sym(83)!(1,2);
s1 := Sym(83)!( 6, 9)( 7,10)( 8,11)(12,22)(13,23)(14,21)(15,28)(16,29)(17,27)
(18,25)(19,26)(20,24)(33,36)(34,37)(35,38)(39,49)(40,50)(41,48)(42,55)(43,56)
(44,54)(45,52)(46,53)(47,51)(60,63)(61,64)(62,65)(66,76)(67,77)(68,75)(69,82)
(70,83)(71,81)(72,79)(73,80)(74,78);
s2 := Sym(83)!( 4, 5)( 6, 9)( 7,11)( 8,10)(12,18)(13,20)(14,19)(16,17)(21,24)
(22,26)(23,25)(28,29)(30,80)(31,79)(32,78)(33,77)(34,76)(35,75)(36,83)(37,82)
(38,81)(39,59)(40,58)(41,57)(42,65)(43,64)(44,63)(45,62)(46,61)(47,60)(48,74)
(49,73)(50,72)(51,71)(52,70)(53,69)(54,68)(55,67)(56,66);
s3 := Sym(83)!( 3,30)( 4,32)( 5,31)( 6,33)( 7,35)( 8,34)( 9,36)(10,38)(11,37)
(12,48)(13,50)(14,49)(15,51)(16,53)(17,52)(18,54)(19,56)(20,55)(21,39)(22,41)
(23,40)(24,42)(25,44)(26,43)(27,45)(28,47)(29,46)(57,59)(60,62)(63,65)(66,77)
(67,76)(68,75)(69,80)(70,79)(71,78)(72,83)(73,82)(74,81);
poly := sub<Sym(83)|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*s1*s0*s1, s0*s2*s0*s2, s0*s3*s0*s3, 
s1*s3*s1*s3, s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2, 
s3*s2*s1*s2*s1*s2*s3*s2*s3*s2*s1*s2*s3*s2*s1*s2*s3*s2*s1 >; 
 

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