Polytope of Type {4,18}

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {4,18}*1944c
if this polytope has a name.
Group : SmallGroup(1944,806)
Rank : 3
Schlafli Type : {4,18}
Number of vertices, edges, etc : 54, 486, 243
Order of s₀s₁s₂ : 12
Order of s₀s₁s₂s₁ : 18
Special Properties :
   Compact Hyperbolic Quotient
   Locally Spherical
   Non-Orientable
Related Polytopes :
   Facet
   Vertex Figure
   Dual
   Petrial
   Halving Operation
Facet Of :
   None in this Atlas
Vertex Figure Of :
   None in this Atlas
Quotients (Maximal Quotients in Boldface) :
   9-fold quotients : {4,6}*216
   27-fold quotients : {4,6}*72
Covers (Minimal Covers in Boldface) :
   None in this atlas.
Permutation Representation (GAP) :

s0 := (  2,  9)(  3,  5)(  6,  8)( 10, 19)( 11, 27)( 12, 23)( 13, 22)( 14, 21)
( 15, 26)( 16, 25)( 17, 24)( 18, 20)( 28, 42)( 29, 38)( 30, 43)( 31, 45)
( 32, 41)( 33, 37)( 34, 39)( 35, 44)( 36, 40)( 46, 51)( 48, 52)( 49, 54)
( 55, 73)( 56, 81)( 57, 77)( 58, 76)( 59, 75)( 60, 80)( 61, 79)( 62, 78)
( 63, 74)( 65, 72)( 66, 68)( 69, 71)( 82,168)( 83,164)( 84,169)( 85,171)
( 86,167)( 87,163)( 88,165)( 89,170)( 90,166)( 91,186)( 92,182)( 93,187)
( 94,189)( 95,185)( 96,181)( 97,183)( 98,188)( 99,184)(100,177)(101,173)
(102,178)(103,180)(104,176)(105,172)(106,174)(107,179)(108,175)(109,206)
(110,202)(111,201)(112,200)(113,205)(114,204)(115,203)(116,199)(117,207)
(118,197)(119,193)(120,192)(121,191)(122,196)(123,195)(124,194)(125,190)
(126,198)(127,215)(128,211)(129,210)(130,209)(131,214)(132,213)(133,212)
(134,208)(135,216)(136,240)(137,236)(138,241)(139,243)(140,239)(141,235)
(142,237)(143,242)(144,238)(145,231)(146,227)(147,232)(148,234)(149,230)
(150,226)(151,228)(152,233)(153,229)(154,222)(155,218)(156,223)(157,225)
(158,221)(159,217)(160,219)(161,224)(162,220);;
s1 := (  2,  3)(  4,  6)(  7,  8)( 10, 23)( 11, 22)( 12, 24)( 13, 25)( 14, 27)
( 15, 26)( 16, 21)( 17, 20)( 18, 19)( 28,181)( 29,183)( 30,182)( 31,186)
( 32,185)( 33,184)( 34,188)( 35,187)( 36,189)( 37,176)( 38,175)( 39,177)
( 40,178)( 41,180)( 42,179)( 43,174)( 44,173)( 45,172)( 46,171)( 47,170)
( 48,169)( 49,164)( 50,163)( 51,165)( 52,166)( 53,168)( 54,167)( 55, 92)
( 56, 91)( 57, 93)( 58, 94)( 59, 96)( 60, 95)( 61, 99)( 62, 98)( 63, 97)
( 64, 87)( 65, 86)( 66, 85)( 67, 89)( 68, 88)( 69, 90)( 70, 82)( 71, 84)
( 72, 83)( 73,106)( 74,108)( 75,107)( 76,102)( 77,101)( 78,100)( 79,104)
( 80,103)( 81,105)(109,233)(110,232)(111,234)(112,226)(113,228)(114,227)
(115,231)(116,230)(117,229)(118,219)(119,218)(120,217)(121,221)(122,220)
(123,222)(124,223)(125,225)(126,224)(127,238)(128,240)(129,239)(130,243)
(131,242)(132,241)(133,236)(134,235)(135,237)(136,148)(137,150)(138,149)
(139,153)(140,152)(141,151)(142,146)(143,145)(144,147)(154,156)(157,158)
(161,162)(190,191)(194,195)(196,198)(199,213)(200,212)(201,211)(202,215)
(203,214)(204,216)(205,208)(206,210)(207,209);;
s2 := (  1, 64)(  2, 66)(  3, 65)(  4, 70)(  5, 72)(  6, 71)(  7, 67)(  8, 69)
(  9, 68)( 10, 78)( 11, 77)( 12, 76)( 13, 75)( 14, 74)( 15, 73)( 16, 81)
( 17, 80)( 18, 79)( 19, 62)( 20, 61)( 21, 63)( 22, 59)( 23, 58)( 24, 60)
( 25, 56)( 26, 55)( 27, 57)( 28, 35)( 29, 34)( 30, 36)( 31, 32)( 38, 39)
( 40, 43)( 41, 45)( 42, 44)( 46, 51)( 47, 50)( 48, 49)( 52, 54)( 82,231)
( 83,230)( 84,229)( 85,228)( 86,227)( 87,226)( 88,234)( 89,233)( 90,232)
( 91,242)( 92,241)( 93,243)( 94,239)( 95,238)( 96,240)( 97,236)( 98,235)
( 99,237)(100,217)(101,219)(102,218)(103,223)(104,225)(105,224)(106,220)
(107,222)(108,221)(109,190)(110,192)(111,191)(112,196)(113,198)(114,197)
(115,193)(116,195)(117,194)(118,204)(119,203)(120,202)(121,201)(122,200)
(123,199)(124,207)(125,206)(126,205)(127,215)(128,214)(129,216)(130,212)
(131,211)(132,213)(133,209)(134,208)(135,210)(136,181)(137,183)(138,182)
(139,187)(140,189)(141,188)(142,184)(143,186)(144,185)(145,168)(146,167)
(147,166)(148,165)(149,164)(150,163)(151,171)(152,170)(153,169)(154,179)
(155,178)(156,180)(157,176)(158,175)(159,177)(160,173)(161,172)(162,174);;
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, s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s2*s0*s1*s2*s0*s1*s2*s1*s2*s1*s2*s1*s0*s1*s2*s1*s2*s1*s2*s1*s2 ];;
poly := F / rels;;

Permutation Representation (Magma) :

s0 := Sym(243)!(  2,  9)(  3,  5)(  6,  8)( 10, 19)( 11, 27)( 12, 23)( 13, 22)
( 14, 21)( 15, 26)( 16, 25)( 17, 24)( 18, 20)( 28, 42)( 29, 38)( 30, 43)
( 31, 45)( 32, 41)( 33, 37)( 34, 39)( 35, 44)( 36, 40)( 46, 51)( 48, 52)
( 49, 54)( 55, 73)( 56, 81)( 57, 77)( 58, 76)( 59, 75)( 60, 80)( 61, 79)
( 62, 78)( 63, 74)( 65, 72)( 66, 68)( 69, 71)( 82,168)( 83,164)( 84,169)
( 85,171)( 86,167)( 87,163)( 88,165)( 89,170)( 90,166)( 91,186)( 92,182)
( 93,187)( 94,189)( 95,185)( 96,181)( 97,183)( 98,188)( 99,184)(100,177)
(101,173)(102,178)(103,180)(104,176)(105,172)(106,174)(107,179)(108,175)
(109,206)(110,202)(111,201)(112,200)(113,205)(114,204)(115,203)(116,199)
(117,207)(118,197)(119,193)(120,192)(121,191)(122,196)(123,195)(124,194)
(125,190)(126,198)(127,215)(128,211)(129,210)(130,209)(131,214)(132,213)
(133,212)(134,208)(135,216)(136,240)(137,236)(138,241)(139,243)(140,239)
(141,235)(142,237)(143,242)(144,238)(145,231)(146,227)(147,232)(148,234)
(149,230)(150,226)(151,228)(152,233)(153,229)(154,222)(155,218)(156,223)
(157,225)(158,221)(159,217)(160,219)(161,224)(162,220);
s1 := Sym(243)!(  2,  3)(  4,  6)(  7,  8)( 10, 23)( 11, 22)( 12, 24)( 13, 25)
( 14, 27)( 15, 26)( 16, 21)( 17, 20)( 18, 19)( 28,181)( 29,183)( 30,182)
( 31,186)( 32,185)( 33,184)( 34,188)( 35,187)( 36,189)( 37,176)( 38,175)
( 39,177)( 40,178)( 41,180)( 42,179)( 43,174)( 44,173)( 45,172)( 46,171)
( 47,170)( 48,169)( 49,164)( 50,163)( 51,165)( 52,166)( 53,168)( 54,167)
( 55, 92)( 56, 91)( 57, 93)( 58, 94)( 59, 96)( 60, 95)( 61, 99)( 62, 98)
( 63, 97)( 64, 87)( 65, 86)( 66, 85)( 67, 89)( 68, 88)( 69, 90)( 70, 82)
( 71, 84)( 72, 83)( 73,106)( 74,108)( 75,107)( 76,102)( 77,101)( 78,100)
( 79,104)( 80,103)( 81,105)(109,233)(110,232)(111,234)(112,226)(113,228)
(114,227)(115,231)(116,230)(117,229)(118,219)(119,218)(120,217)(121,221)
(122,220)(123,222)(124,223)(125,225)(126,224)(127,238)(128,240)(129,239)
(130,243)(131,242)(132,241)(133,236)(134,235)(135,237)(136,148)(137,150)
(138,149)(139,153)(140,152)(141,151)(142,146)(143,145)(144,147)(154,156)
(157,158)(161,162)(190,191)(194,195)(196,198)(199,213)(200,212)(201,211)
(202,215)(203,214)(204,216)(205,208)(206,210)(207,209);
s2 := Sym(243)!(  1, 64)(  2, 66)(  3, 65)(  4, 70)(  5, 72)(  6, 71)(  7, 67)
(  8, 69)(  9, 68)( 10, 78)( 11, 77)( 12, 76)( 13, 75)( 14, 74)( 15, 73)
( 16, 81)( 17, 80)( 18, 79)( 19, 62)( 20, 61)( 21, 63)( 22, 59)( 23, 58)
( 24, 60)( 25, 56)( 26, 55)( 27, 57)( 28, 35)( 29, 34)( 30, 36)( 31, 32)
( 38, 39)( 40, 43)( 41, 45)( 42, 44)( 46, 51)( 47, 50)( 48, 49)( 52, 54)
( 82,231)( 83,230)( 84,229)( 85,228)( 86,227)( 87,226)( 88,234)( 89,233)
( 90,232)( 91,242)( 92,241)( 93,243)( 94,239)( 95,238)( 96,240)( 97,236)
( 98,235)( 99,237)(100,217)(101,219)(102,218)(103,223)(104,225)(105,224)
(106,220)(107,222)(108,221)(109,190)(110,192)(111,191)(112,196)(113,198)
(114,197)(115,193)(116,195)(117,194)(118,204)(119,203)(120,202)(121,201)
(122,200)(123,199)(124,207)(125,206)(126,205)(127,215)(128,214)(129,216)
(130,212)(131,211)(132,213)(133,209)(134,208)(135,210)(136,181)(137,183)
(138,182)(139,187)(140,189)(141,188)(142,184)(143,186)(144,185)(145,168)
(146,167)(147,166)(148,165)(149,164)(150,163)(151,171)(152,170)(153,169)
(154,179)(155,178)(156,180)(157,176)(158,175)(159,177)(160,173)(161,172)
(162,174);
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, s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s2*s0*s1*s2*s0*s1*s2*s1*s2*s1*s2*s1*s0*s1*s2*s1*s2*s1*s2*s1*s2 >;

References : None.
to this polytope