Polytope of Type {18,4}

Play with this polytope as a twisty puzzle

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {18,4}*1944b
if this polytope has a name.
Group : SmallGroup(1944,805)
Rank : 3
Schlafli Type : {18,4}
Number of vertices, edges, etc : 243, 486, 54
Order of s0s1s2 : 12
Order of s0s1s2s1 : 6
Special Properties :
   Compact Hyperbolic Quotient
   Locally Spherical
   Non-Orientable
Related Polytopes :
   Facet
   Vertex Figure
   Dual
   Petrial
   Skewing Operation
Facet Of :
   None in this Atlas
Vertex Figure Of :
   None in this Atlas
Quotients (Maximal Quotients in Boldface) :
   9-fold quotients : {6,4}*216
   27-fold quotients : {6,4}*72
Covers (Minimal Covers in Boldface) :
   None in this atlas.
Irregular Quotients (of which this is a minimal cover):
   P/N, where N=<s0*s2*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s2> of order 3.
      36 facets:
         9 of {18}*36
         27 of {6}*12
      81 vertex figures:
         81 of {4}*8
   P/N, where N=<s0*s1*s0*s1*s0*s2*s1*s0*s2*s1*s0*s2*s1*s0*s1*s0*s2*s1*s0*s2*s1*s2> of order 3.
      18 facets:
         18 of {18}*36
      81 vertex figures:
         81 of {4}*8
   P/N, where N=<s0*s2*s1*s0*s2*s1*s0*s2*s1*s0*s2*s1> of order 3.
      18 facets:
         18 of {18}*36
      81 vertex figures:
         81 of {4}*8
   P/N, where N=<s0*s2*s1*s0*s2*s1*s0*s2*s1*s0*s2*s1, s0*s1*s0*s1*s0*s2*s1*s0*s1*s0*s1*s2*s1> of order 9.
      12 facets:
         3 of {18}*36
         9 of {6}*12
      27 vertex figures:
         27 of {4}*8
   P/N, where N=<s0*s2*s1*s0*s2*s1*s0*s2*s1*s0*s2*s1, s0*s1*s2*s1*s0*s1*s0*s1*s0*s2*s1*s0*s1> of order 9.
      6 facets:
         6 of {18}*36
      27 vertex figures:
         27 of {4}*8

Permutation Representation (GAP) : 
s0 := (  2,  3)(  4,  7)(  5,  9)(  6,  8)( 10, 17)( 11, 16)( 12, 18)( 13, 14)( 19, 24)( 20, 23)( 21, 22)( 25, 27)( 28, 78)( 29, 77)( 30, 76)( 31, 75)( 32, 74)( 33, 73)( 34, 81)( 35, 80)( 36, 79)( 37, 55)( 38, 57)( 39, 56)( 40, 61)( 41, 63)( 42, 62)( 43, 58)( 44, 60)( 45, 59)( 46, 71)( 47, 70)( 48, 72)( 49, 68)( 50, 67)( 51, 69)( 52, 65)( 53, 64)( 54, 66)( 82,163)( 83,165)( 84,164)( 85,169)( 86,171)( 87,170)( 88,166)( 89,168)( 90,167)( 91,179)( 92,178)( 93,180)( 94,176)( 95,175)( 96,177)( 97,173)( 98,172)( 99,174)(100,186)(101,185)(102,184)(103,183)(104,182)(105,181)(106,189)(107,188)(108,187)(109,240)(110,239)(111,238)(112,237)(113,236)(114,235)(115,243)(116,242)(117,241)(118,217)(119,219)(120,218)(121,223)(122,225)(123,224)(124,220)(125,222)(126,221)(127,233)(128,232)(129,234)(130,230)(131,229)(132,231)(133,227)(134,226)(135,228)(136,199)(137,201)(138,200)(139,205)(140,207)(141,206)(142,202)(143,204)(144,203)(145,215)(146,214)(147,216)(148,212)(149,211)(150,213)(151,209)(152,208)(153,210)(154,195)(155,194)(156,193)(157,192)(158,191)(159,190)(160,198)(161,197)(162,196);;
s1 := (  1,136)(  2,137)(  3,138)(  4,143)(  5,144)(  6,142)(  7,141)(  8,139)(  9,140)( 10,154)( 11,155)( 12,156)( 13,161)( 14,162)( 15,160)( 16,159)( 17,157)( 18,158)( 19,145)( 20,146)( 21,147)( 22,152)( 23,153)( 24,151)( 25,150)( 26,148)( 27,149)( 28,236)( 29,237)( 30,235)( 31,243)( 32,241)( 33,242)( 34,238)( 35,239)( 36,240)( 37,227)( 38,228)( 39,226)( 40,234)( 41,232)( 42,233)( 43,229)( 44,230)( 45,231)( 46,218)( 47,219)( 48,217)( 49,225)( 50,223)( 51,224)( 52,220)( 53,221)( 54,222)( 55, 72)( 56, 70)( 57, 71)( 58, 67)( 59, 68)( 60, 69)( 61, 65)( 62, 66)( 63, 64)( 73, 81)( 74, 79)( 75, 80)( 82, 90)( 83, 88)( 84, 89)( 91,108)( 92,106)( 93,107)( 94,103)( 95,104)( 96,105)( 97,101)( 98,102)( 99,100)(109,167)(110,168)(111,166)(112,165)(113,163)(114,164)(115,169)(116,170)(117,171)(118,185)(119,186)(120,184)(121,183)(122,181)(123,182)(124,187)(125,188)(126,189)(127,176)(128,177)(129,175)(130,174)(131,172)(132,173)(133,178)(134,179)(135,180)(190,199)(191,200)(192,201)(193,206)(194,207)(195,205)(196,204)(197,202)(198,203)(211,215)(212,216)(213,214);;
s2 := (  2,  5)(  3,  9)(  4,  7)( 10, 24)( 11, 25)( 12, 20)( 13, 21)( 14, 22)( 15, 26)( 16, 27)( 17, 19)( 18, 23)( 28, 60)( 29, 61)( 30, 56)( 31, 57)( 32, 58)( 33, 62)( 34, 63)( 35, 55)( 36, 59)( 37, 80)( 38, 75)( 39, 76)( 40, 77)( 41, 81)( 42, 73)( 43, 74)( 44, 78)( 45, 79)( 46, 64)( 47, 68)( 48, 72)( 49, 70)( 50, 65)( 51, 69)( 52, 67)( 53, 71)( 54, 66)( 83, 86)( 84, 90)( 85, 88)( 91,105)( 92,106)( 93,101)( 94,102)( 95,103)( 96,107)( 97,108)( 98,100)( 99,104)(109,141)(110,142)(111,137)(112,138)(113,139)(114,143)(115,144)(116,136)(117,140)(118,161)(119,156)(120,157)(121,158)(122,162)(123,154)(124,155)(125,159)(126,160)(127,145)(128,149)(129,153)(130,151)(131,146)(132,150)(133,148)(134,152)(135,147)(164,167)(165,171)(166,169)(172,186)(173,187)(174,182)(175,183)(176,184)(177,188)(178,189)(179,181)(180,185)(190,222)(191,223)(192,218)(193,219)(194,220)(195,224)(196,225)(197,217)(198,221)(199,242)(200,237)(201,238)(202,239)(203,243)(204,235)(205,236)(206,240)(207,241)(208,226)(209,230)(210,234)(211,232)(212,227)(213,231)(214,229)(215,233)(216,228);;
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, s1*s2*s1*s2*s1*s2*s1*s2, 
s2*s1*s2*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1, 
s0*s1*s0*s1*s0*s1*s0*s1*s2*s0*s1*s2*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s2*s0*s1*s2*s0*s1 ];;
poly := F / rels;;
Permutation Representation (Magma) : 
s0 := Sym(243)!(  2,  3)(  4,  7)(  5,  9)(  6,  8)( 10, 17)( 11, 16)( 12, 18)( 13, 14)( 19, 24)( 20, 23)( 21, 22)( 25, 27)( 28, 78)( 29, 77)( 30, 76)( 31, 75)( 32, 74)( 33, 73)( 34, 81)( 35, 80)( 36, 79)( 37, 55)( 38, 57)( 39, 56)( 40, 61)( 41, 63)( 42, 62)( 43, 58)( 44, 60)( 45, 59)( 46, 71)( 47, 70)( 48, 72)( 49, 68)( 50, 67)( 51, 69)( 52, 65)( 53, 64)( 54, 66)( 82,163)( 83,165)( 84,164)( 85,169)( 86,171)( 87,170)( 88,166)( 89,168)( 90,167)( 91,179)( 92,178)( 93,180)( 94,176)( 95,175)( 96,177)( 97,173)( 98,172)( 99,174)(100,186)(101,185)(102,184)(103,183)(104,182)(105,181)(106,189)(107,188)(108,187)(109,240)(110,239)(111,238)(112,237)(113,236)(114,235)(115,243)(116,242)(117,241)(118,217)(119,219)(120,218)(121,223)(122,225)(123,224)(124,220)(125,222)(126,221)(127,233)(128,232)(129,234)(130,230)(131,229)(132,231)(133,227)(134,226)(135,228)(136,199)(137,201)(138,200)(139,205)(140,207)(141,206)(142,202)(143,204)(144,203)(145,215)(146,214)(147,216)(148,212)(149,211)(150,213)(151,209)(152,208)(153,210)(154,195)(155,194)(156,193)(157,192)(158,191)(159,190)(160,198)(161,197)(162,196);
s1 := Sym(243)!(  1,136)(  2,137)(  3,138)(  4,143)(  5,144)(  6,142)(  7,141)(  8,139)(  9,140)( 10,154)( 11,155)( 12,156)( 13,161)( 14,162)( 15,160)( 16,159)( 17,157)( 18,158)( 19,145)( 20,146)( 21,147)( 22,152)( 23,153)( 24,151)( 25,150)( 26,148)( 27,149)( 28,236)( 29,237)( 30,235)( 31,243)( 32,241)( 33,242)( 34,238)( 35,239)( 36,240)( 37,227)( 38,228)( 39,226)( 40,234)( 41,232)( 42,233)( 43,229)( 44,230)( 45,231)( 46,218)( 47,219)( 48,217)( 49,225)( 50,223)( 51,224)( 52,220)( 53,221)( 54,222)( 55, 72)( 56, 70)( 57, 71)( 58, 67)( 59, 68)( 60, 69)( 61, 65)( 62, 66)( 63, 64)( 73, 81)( 74, 79)( 75, 80)( 82, 90)( 83, 88)( 84, 89)( 91,108)( 92,106)( 93,107)( 94,103)( 95,104)( 96,105)( 97,101)( 98,102)( 99,100)(109,167)(110,168)(111,166)(112,165)(113,163)(114,164)(115,169)(116,170)(117,171)(118,185)(119,186)(120,184)(121,183)(122,181)(123,182)(124,187)(125,188)(126,189)(127,176)(128,177)(129,175)(130,174)(131,172)(132,173)(133,178)(134,179)(135,180)(190,199)(191,200)(192,201)(193,206)(194,207)(195,205)(196,204)(197,202)(198,203)(211,215)(212,216)(213,214);
s2 := Sym(243)!(  2,  5)(  3,  9)(  4,  7)( 10, 24)( 11, 25)( 12, 20)( 13, 21)( 14, 22)( 15, 26)( 16, 27)( 17, 19)( 18, 23)( 28, 60)( 29, 61)( 30, 56)( 31, 57)( 32, 58)( 33, 62)( 34, 63)( 35, 55)( 36, 59)( 37, 80)( 38, 75)( 39, 76)( 40, 77)( 41, 81)( 42, 73)( 43, 74)( 44, 78)( 45, 79)( 46, 64)( 47, 68)( 48, 72)( 49, 70)( 50, 65)( 51, 69)( 52, 67)( 53, 71)( 54, 66)( 83, 86)( 84, 90)( 85, 88)( 91,105)( 92,106)( 93,101)( 94,102)( 95,103)( 96,107)( 97,108)( 98,100)( 99,104)(109,141)(110,142)(111,137)(112,138)(113,139)(114,143)(115,144)(116,136)(117,140)(118,161)(119,156)(120,157)(121,158)(122,162)(123,154)(124,155)(125,159)(126,160)(127,145)(128,149)(129,153)(130,151)(131,146)(132,150)(133,148)(134,152)(135,147)(164,167)(165,171)(166,169)(172,186)(173,187)(174,182)(175,183)(176,184)(177,188)(178,189)(179,181)(180,185)(190,222)(191,223)(192,218)(193,219)(194,220)(195,224)(196,225)(197,217)(198,221)(199,242)(200,237)(201,238)(202,239)(203,243)(204,235)(205,236)(206,240)(207,241)(208,226)(209,230)(210,234)(211,232)(212,227)(213,231)(214,229)(215,233)(216,228);
poly := sub<Sym(243)|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, s1*s2*s1*s2*s1*s2*s1*s2, 
s2*s1*s2*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1, 
s0*s1*s0*s1*s0*s1*s0*s1*s2*s0*s1*s2*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s2*s0*s1*s2*s0*s1 >;
References : None.
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