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Polytope of Type {18,4,6}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {18,4,6}*864
Also Known As : {{18,4|2},{4,6|2}}. if this polytope has another name.
Group : SmallGroup(864,2462)
Rank : 4
Schlafli Type : {18,4,6}
Number of vertices, edges, etc : 18, 36, 12, 6
Order of s0s1s2s3 : 36
Order of s0s1s2s3s2s1 : 2
Special Properties :
   Universal
   Orientable
   Flat
Related Polytopes :
   Facet
   Vertex Figure
   Dual
Facet Of :
   {18,4,6,2} of size 1728
Vertex Figure Of :
   {2,18,4,6} of size 1728
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {18,2,6}*432
   3-fold quotients : {18,4,2}*288a, {6,4,6}*288
   4-fold quotients : {9,2,6}*216, {18,2,3}*216
   6-fold quotients : {18,2,2}*144, {6,2,6}*144
   8-fold quotients : {9,2,3}*108
   9-fold quotients : {2,4,6}*96a, {6,4,2}*96a
   12-fold quotients : {9,2,2}*72, {3,2,6}*72, {6,2,3}*72
   18-fold quotients : {2,2,6}*48, {6,2,2}*48
   24-fold quotients : {3,2,3}*36
   27-fold quotients : {2,4,2}*32
   36-fold quotients : {2,2,3}*24, {3,2,2}*24
   54-fold quotients : {2,2,2}*16
Covers (Minimal Covers in Boldface) :
   2-fold covers : {18,4,12}*1728, {36,4,6}*1728, {18,8,6}*1728
Permutation Representation (GAP) :
s0 := (  2,  3)(  5,  6)(  8,  9)( 10, 21)( 11, 20)( 12, 19)( 13, 24)( 14, 23)
( 15, 22)( 16, 27)( 17, 26)( 18, 25)( 29, 30)( 32, 33)( 35, 36)( 37, 48)
( 38, 47)( 39, 46)( 40, 51)( 41, 50)( 42, 49)( 43, 54)( 44, 53)( 45, 52)
( 56, 57)( 59, 60)( 62, 63)( 64, 75)( 65, 74)( 66, 73)( 67, 78)( 68, 77)
( 69, 76)( 70, 81)( 71, 80)( 72, 79)( 83, 84)( 86, 87)( 89, 90)( 91,102)
( 92,101)( 93,100)( 94,105)( 95,104)( 96,103)( 97,108)( 98,107)( 99,106);;
s1 := (  1, 10)(  2, 12)(  3, 11)(  4, 13)(  5, 15)(  6, 14)(  7, 16)(  8, 18)
(  9, 17)( 19, 21)( 22, 24)( 25, 27)( 28, 37)( 29, 39)( 30, 38)( 31, 40)
( 32, 42)( 33, 41)( 34, 43)( 35, 45)( 36, 44)( 46, 48)( 49, 51)( 52, 54)
( 55, 91)( 56, 93)( 57, 92)( 58, 94)( 59, 96)( 60, 95)( 61, 97)( 62, 99)
( 63, 98)( 64, 82)( 65, 84)( 66, 83)( 67, 85)( 68, 87)( 69, 86)( 70, 88)
( 71, 90)( 72, 89)( 73,102)( 74,101)( 75,100)( 76,105)( 77,104)( 78,103)
( 79,108)( 80,107)( 81,106);;
s2 := (  1, 55)(  2, 56)(  3, 57)(  4, 61)(  5, 62)(  6, 63)(  7, 58)(  8, 59)
(  9, 60)( 10, 64)( 11, 65)( 12, 66)( 13, 70)( 14, 71)( 15, 72)( 16, 67)
( 17, 68)( 18, 69)( 19, 73)( 20, 74)( 21, 75)( 22, 79)( 23, 80)( 24, 81)
( 25, 76)( 26, 77)( 27, 78)( 28, 82)( 29, 83)( 30, 84)( 31, 88)( 32, 89)
( 33, 90)( 34, 85)( 35, 86)( 36, 87)( 37, 91)( 38, 92)( 39, 93)( 40, 97)
( 41, 98)( 42, 99)( 43, 94)( 44, 95)( 45, 96)( 46,100)( 47,101)( 48,102)
( 49,106)( 50,107)( 51,108)( 52,103)( 53,104)( 54,105);;
s3 := (  1,  4)(  2,  5)(  3,  6)( 10, 13)( 11, 14)( 12, 15)( 19, 22)( 20, 23)
( 21, 24)( 28, 31)( 29, 32)( 30, 33)( 37, 40)( 38, 41)( 39, 42)( 46, 49)
( 47, 50)( 48, 51)( 55, 58)( 56, 59)( 57, 60)( 64, 67)( 65, 68)( 66, 69)
( 73, 76)( 74, 77)( 75, 78)( 82, 85)( 83, 86)( 84, 87)( 91, 94)( 92, 95)
( 93, 96)(100,103)(101,104)(102,105);;
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, s0*s1*s2*s1*s0*s1*s2*s1, 
s1*s2*s1*s2*s1*s2*s1*s2, s1*s2*s3*s2*s1*s2*s3*s2, 
s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1 ];;
poly := F / rels;;
 
Permutation Representation (Magma) :
s0 := Sym(108)!(  2,  3)(  5,  6)(  8,  9)( 10, 21)( 11, 20)( 12, 19)( 13, 24)
( 14, 23)( 15, 22)( 16, 27)( 17, 26)( 18, 25)( 29, 30)( 32, 33)( 35, 36)
( 37, 48)( 38, 47)( 39, 46)( 40, 51)( 41, 50)( 42, 49)( 43, 54)( 44, 53)
( 45, 52)( 56, 57)( 59, 60)( 62, 63)( 64, 75)( 65, 74)( 66, 73)( 67, 78)
( 68, 77)( 69, 76)( 70, 81)( 71, 80)( 72, 79)( 83, 84)( 86, 87)( 89, 90)
( 91,102)( 92,101)( 93,100)( 94,105)( 95,104)( 96,103)( 97,108)( 98,107)
( 99,106);
s1 := Sym(108)!(  1, 10)(  2, 12)(  3, 11)(  4, 13)(  5, 15)(  6, 14)(  7, 16)
(  8, 18)(  9, 17)( 19, 21)( 22, 24)( 25, 27)( 28, 37)( 29, 39)( 30, 38)
( 31, 40)( 32, 42)( 33, 41)( 34, 43)( 35, 45)( 36, 44)( 46, 48)( 49, 51)
( 52, 54)( 55, 91)( 56, 93)( 57, 92)( 58, 94)( 59, 96)( 60, 95)( 61, 97)
( 62, 99)( 63, 98)( 64, 82)( 65, 84)( 66, 83)( 67, 85)( 68, 87)( 69, 86)
( 70, 88)( 71, 90)( 72, 89)( 73,102)( 74,101)( 75,100)( 76,105)( 77,104)
( 78,103)( 79,108)( 80,107)( 81,106);
s2 := Sym(108)!(  1, 55)(  2, 56)(  3, 57)(  4, 61)(  5, 62)(  6, 63)(  7, 58)
(  8, 59)(  9, 60)( 10, 64)( 11, 65)( 12, 66)( 13, 70)( 14, 71)( 15, 72)
( 16, 67)( 17, 68)( 18, 69)( 19, 73)( 20, 74)( 21, 75)( 22, 79)( 23, 80)
( 24, 81)( 25, 76)( 26, 77)( 27, 78)( 28, 82)( 29, 83)( 30, 84)( 31, 88)
( 32, 89)( 33, 90)( 34, 85)( 35, 86)( 36, 87)( 37, 91)( 38, 92)( 39, 93)
( 40, 97)( 41, 98)( 42, 99)( 43, 94)( 44, 95)( 45, 96)( 46,100)( 47,101)
( 48,102)( 49,106)( 50,107)( 51,108)( 52,103)( 53,104)( 54,105);
s3 := Sym(108)!(  1,  4)(  2,  5)(  3,  6)( 10, 13)( 11, 14)( 12, 15)( 19, 22)
( 20, 23)( 21, 24)( 28, 31)( 29, 32)( 30, 33)( 37, 40)( 38, 41)( 39, 42)
( 46, 49)( 47, 50)( 48, 51)( 55, 58)( 56, 59)( 57, 60)( 64, 67)( 65, 68)
( 66, 69)( 73, 76)( 74, 77)( 75, 78)( 82, 85)( 83, 86)( 84, 87)( 91, 94)
( 92, 95)( 93, 96)(100,103)(101,104)(102,105);
poly := sub<Sym(108)|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, 
s0*s1*s2*s1*s0*s1*s2*s1, s1*s2*s1*s2*s1*s2*s1*s2, 
s1*s2*s3*s2*s1*s2*s3*s2, s2*s3*s2*s3*s2*s3*s2*s3*s2*s3*s2*s3, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1 >; 
 
References : None.
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