# Polytope of Type {15,6,4}

Atlas Canonical Name : {15,6,4}*960
if this polytope has a name.
Group : SmallGroup(960,10994)
Rank : 4
Schlafli Type : {15,6,4}
Number of vertices, edges, etc : 20, 60, 16, 4
Order of s0s1s2s3 : 20
Order of s0s1s2s3s2s1 : 2
Special Properties :
Universal
Orientable
Flat
Related Polytopes :
Facet
Vertex Figure
Dual
Facet Of :
{15,6,4,2} of size 1920
Vertex Figure Of :
{2,15,6,4} of size 1920
Quotients (Maximal Quotients in Boldface) :
2-fold quotients : {15,6,2}*480
5-fold quotients : {3,6,4}*192
10-fold quotients : {3,6,2}*96
12-fold quotients : {5,2,4}*80
20-fold quotients : {3,3,2}*48
24-fold quotients : {5,2,2}*40
Covers (Minimal Covers in Boldface) :
2-fold covers : {15,6,8}*1920, {15,12,4}*1920, {30,6,4}*1920
Permutation Representation (GAP) :
```s0 := (  2,  3)(  5, 17)(  6, 19)(  7, 18)(  8, 20)(  9, 13)( 10, 15)( 11, 14)
( 12, 16)( 21, 41)( 22, 43)( 23, 42)( 24, 44)( 25, 57)( 26, 59)( 27, 58)
( 28, 60)( 29, 53)( 30, 55)( 31, 54)( 32, 56)( 33, 49)( 34, 51)( 35, 50)
( 36, 52)( 37, 45)( 38, 47)( 39, 46)( 40, 48)( 62, 63)( 65, 77)( 66, 79)
( 67, 78)( 68, 80)( 69, 73)( 70, 75)( 71, 74)( 72, 76)( 81,101)( 82,103)
( 83,102)( 84,104)( 85,117)( 86,119)( 87,118)( 88,120)( 89,113)( 90,115)
( 91,114)( 92,116)( 93,109)( 94,111)( 95,110)( 96,112)( 97,105)( 98,107)
( 99,106)(100,108)(122,123)(125,137)(126,139)(127,138)(128,140)(129,133)
(130,135)(131,134)(132,136)(141,161)(142,163)(143,162)(144,164)(145,177)
(146,179)(147,178)(148,180)(149,173)(150,175)(151,174)(152,176)(153,169)
(154,171)(155,170)(156,172)(157,165)(158,167)(159,166)(160,168)(182,183)
(185,197)(186,199)(187,198)(188,200)(189,193)(190,195)(191,194)(192,196)
(201,221)(202,223)(203,222)(204,224)(205,237)(206,239)(207,238)(208,240)
(209,233)(210,235)(211,234)(212,236)(213,229)(214,231)(215,230)(216,232)
(217,225)(218,227)(219,226)(220,228);;
s1 := (  1, 25)(  2, 26)(  3, 28)(  4, 27)(  5, 21)(  6, 22)(  7, 24)(  8, 23)
(  9, 37)( 10, 38)( 11, 40)( 12, 39)( 13, 33)( 14, 34)( 15, 36)( 16, 35)
( 17, 29)( 18, 30)( 19, 32)( 20, 31)( 41, 45)( 42, 46)( 43, 48)( 44, 47)
( 49, 57)( 50, 58)( 51, 60)( 52, 59)( 55, 56)( 61, 85)( 62, 86)( 63, 88)
( 64, 87)( 65, 81)( 66, 82)( 67, 84)( 68, 83)( 69, 97)( 70, 98)( 71,100)
( 72, 99)( 73, 93)( 74, 94)( 75, 96)( 76, 95)( 77, 89)( 78, 90)( 79, 92)
( 80, 91)(101,105)(102,106)(103,108)(104,107)(109,117)(110,118)(111,120)
(112,119)(115,116)(121,145)(122,146)(123,148)(124,147)(125,141)(126,142)
(127,144)(128,143)(129,157)(130,158)(131,160)(132,159)(133,153)(134,154)
(135,156)(136,155)(137,149)(138,150)(139,152)(140,151)(161,165)(162,166)
(163,168)(164,167)(169,177)(170,178)(171,180)(172,179)(175,176)(181,205)
(182,206)(183,208)(184,207)(185,201)(186,202)(187,204)(188,203)(189,217)
(190,218)(191,220)(192,219)(193,213)(194,214)(195,216)(196,215)(197,209)
(198,210)(199,212)(200,211)(221,225)(222,226)(223,228)(224,227)(229,237)
(230,238)(231,240)(232,239)(235,236);;
s2 := (  1,  4)(  5,  8)(  9, 12)( 13, 16)( 17, 20)( 21, 44)( 22, 42)( 23, 43)
( 24, 41)( 25, 48)( 26, 46)( 27, 47)( 28, 45)( 29, 52)( 30, 50)( 31, 51)
( 32, 49)( 33, 56)( 34, 54)( 35, 55)( 36, 53)( 37, 60)( 38, 58)( 39, 59)
( 40, 57)( 61, 64)( 65, 68)( 69, 72)( 73, 76)( 77, 80)( 81,104)( 82,102)
( 83,103)( 84,101)( 85,108)( 86,106)( 87,107)( 88,105)( 89,112)( 90,110)
( 91,111)( 92,109)( 93,116)( 94,114)( 95,115)( 96,113)( 97,120)( 98,118)
( 99,119)(100,117)(121,184)(122,182)(123,183)(124,181)(125,188)(126,186)
(127,187)(128,185)(129,192)(130,190)(131,191)(132,189)(133,196)(134,194)
(135,195)(136,193)(137,200)(138,198)(139,199)(140,197)(141,224)(142,222)
(143,223)(144,221)(145,228)(146,226)(147,227)(148,225)(149,232)(150,230)
(151,231)(152,229)(153,236)(154,234)(155,235)(156,233)(157,240)(158,238)
(159,239)(160,237)(161,204)(162,202)(163,203)(164,201)(165,208)(166,206)
(167,207)(168,205)(169,212)(170,210)(171,211)(172,209)(173,216)(174,214)
(175,215)(176,213)(177,220)(178,218)(179,219)(180,217);;
s3 := (  1,121)(  2,122)(  3,123)(  4,124)(  5,125)(  6,126)(  7,127)(  8,128)
(  9,129)( 10,130)( 11,131)( 12,132)( 13,133)( 14,134)( 15,135)( 16,136)
( 17,137)( 18,138)( 19,139)( 20,140)( 21,141)( 22,142)( 23,143)( 24,144)
( 25,145)( 26,146)( 27,147)( 28,148)( 29,149)( 30,150)( 31,151)( 32,152)
( 33,153)( 34,154)( 35,155)( 36,156)( 37,157)( 38,158)( 39,159)( 40,160)
( 41,161)( 42,162)( 43,163)( 44,164)( 45,165)( 46,166)( 47,167)( 48,168)
( 49,169)( 50,170)( 51,171)( 52,172)( 53,173)( 54,174)( 55,175)( 56,176)
( 57,177)( 58,178)( 59,179)( 60,180)( 61,181)( 62,182)( 63,183)( 64,184)
( 65,185)( 66,186)( 67,187)( 68,188)( 69,189)( 70,190)( 71,191)( 72,192)
( 73,193)( 74,194)( 75,195)( 76,196)( 77,197)( 78,198)( 79,199)( 80,200)
( 81,201)( 82,202)( 83,203)( 84,204)( 85,205)( 86,206)( 87,207)( 88,208)
( 89,209)( 90,210)( 91,211)( 92,212)( 93,213)( 94,214)( 95,215)( 96,216)
( 97,217)( 98,218)( 99,219)(100,220)(101,221)(102,222)(103,223)(104,224)
(105,225)(106,226)(107,227)(108,228)(109,229)(110,230)(111,231)(112,232)
(113,233)(114,234)(115,235)(116,236)(117,237)(118,238)(119,239)(120,240);;
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, s1*s2*s3*s2*s1*s2*s3*s2,
s2*s3*s2*s3*s2*s3*s2*s3, s0*s1*s2*s1*s0*s1*s0*s1*s2*s1*s0*s1,
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2,
s0*s1*s2*s1*s2*s1*s0*s1*s0*s2*s1*s0*s1*s2*s0*s1 ];;
poly := F / rels;;

```
Permutation Representation (Magma) :
```s0 := Sym(240)!(  2,  3)(  5, 17)(  6, 19)(  7, 18)(  8, 20)(  9, 13)( 10, 15)
( 11, 14)( 12, 16)( 21, 41)( 22, 43)( 23, 42)( 24, 44)( 25, 57)( 26, 59)
( 27, 58)( 28, 60)( 29, 53)( 30, 55)( 31, 54)( 32, 56)( 33, 49)( 34, 51)
( 35, 50)( 36, 52)( 37, 45)( 38, 47)( 39, 46)( 40, 48)( 62, 63)( 65, 77)
( 66, 79)( 67, 78)( 68, 80)( 69, 73)( 70, 75)( 71, 74)( 72, 76)( 81,101)
( 82,103)( 83,102)( 84,104)( 85,117)( 86,119)( 87,118)( 88,120)( 89,113)
( 90,115)( 91,114)( 92,116)( 93,109)( 94,111)( 95,110)( 96,112)( 97,105)
( 98,107)( 99,106)(100,108)(122,123)(125,137)(126,139)(127,138)(128,140)
(129,133)(130,135)(131,134)(132,136)(141,161)(142,163)(143,162)(144,164)
(145,177)(146,179)(147,178)(148,180)(149,173)(150,175)(151,174)(152,176)
(153,169)(154,171)(155,170)(156,172)(157,165)(158,167)(159,166)(160,168)
(182,183)(185,197)(186,199)(187,198)(188,200)(189,193)(190,195)(191,194)
(192,196)(201,221)(202,223)(203,222)(204,224)(205,237)(206,239)(207,238)
(208,240)(209,233)(210,235)(211,234)(212,236)(213,229)(214,231)(215,230)
(216,232)(217,225)(218,227)(219,226)(220,228);
s1 := Sym(240)!(  1, 25)(  2, 26)(  3, 28)(  4, 27)(  5, 21)(  6, 22)(  7, 24)
(  8, 23)(  9, 37)( 10, 38)( 11, 40)( 12, 39)( 13, 33)( 14, 34)( 15, 36)
( 16, 35)( 17, 29)( 18, 30)( 19, 32)( 20, 31)( 41, 45)( 42, 46)( 43, 48)
( 44, 47)( 49, 57)( 50, 58)( 51, 60)( 52, 59)( 55, 56)( 61, 85)( 62, 86)
( 63, 88)( 64, 87)( 65, 81)( 66, 82)( 67, 84)( 68, 83)( 69, 97)( 70, 98)
( 71,100)( 72, 99)( 73, 93)( 74, 94)( 75, 96)( 76, 95)( 77, 89)( 78, 90)
( 79, 92)( 80, 91)(101,105)(102,106)(103,108)(104,107)(109,117)(110,118)
(111,120)(112,119)(115,116)(121,145)(122,146)(123,148)(124,147)(125,141)
(126,142)(127,144)(128,143)(129,157)(130,158)(131,160)(132,159)(133,153)
(134,154)(135,156)(136,155)(137,149)(138,150)(139,152)(140,151)(161,165)
(162,166)(163,168)(164,167)(169,177)(170,178)(171,180)(172,179)(175,176)
(181,205)(182,206)(183,208)(184,207)(185,201)(186,202)(187,204)(188,203)
(189,217)(190,218)(191,220)(192,219)(193,213)(194,214)(195,216)(196,215)
(197,209)(198,210)(199,212)(200,211)(221,225)(222,226)(223,228)(224,227)
(229,237)(230,238)(231,240)(232,239)(235,236);
s2 := Sym(240)!(  1,  4)(  5,  8)(  9, 12)( 13, 16)( 17, 20)( 21, 44)( 22, 42)
( 23, 43)( 24, 41)( 25, 48)( 26, 46)( 27, 47)( 28, 45)( 29, 52)( 30, 50)
( 31, 51)( 32, 49)( 33, 56)( 34, 54)( 35, 55)( 36, 53)( 37, 60)( 38, 58)
( 39, 59)( 40, 57)( 61, 64)( 65, 68)( 69, 72)( 73, 76)( 77, 80)( 81,104)
( 82,102)( 83,103)( 84,101)( 85,108)( 86,106)( 87,107)( 88,105)( 89,112)
( 90,110)( 91,111)( 92,109)( 93,116)( 94,114)( 95,115)( 96,113)( 97,120)
( 98,118)( 99,119)(100,117)(121,184)(122,182)(123,183)(124,181)(125,188)
(126,186)(127,187)(128,185)(129,192)(130,190)(131,191)(132,189)(133,196)
(134,194)(135,195)(136,193)(137,200)(138,198)(139,199)(140,197)(141,224)
(142,222)(143,223)(144,221)(145,228)(146,226)(147,227)(148,225)(149,232)
(150,230)(151,231)(152,229)(153,236)(154,234)(155,235)(156,233)(157,240)
(158,238)(159,239)(160,237)(161,204)(162,202)(163,203)(164,201)(165,208)
(166,206)(167,207)(168,205)(169,212)(170,210)(171,211)(172,209)(173,216)
(174,214)(175,215)(176,213)(177,220)(178,218)(179,219)(180,217);
s3 := Sym(240)!(  1,121)(  2,122)(  3,123)(  4,124)(  5,125)(  6,126)(  7,127)
(  8,128)(  9,129)( 10,130)( 11,131)( 12,132)( 13,133)( 14,134)( 15,135)
( 16,136)( 17,137)( 18,138)( 19,139)( 20,140)( 21,141)( 22,142)( 23,143)
( 24,144)( 25,145)( 26,146)( 27,147)( 28,148)( 29,149)( 30,150)( 31,151)
( 32,152)( 33,153)( 34,154)( 35,155)( 36,156)( 37,157)( 38,158)( 39,159)
( 40,160)( 41,161)( 42,162)( 43,163)( 44,164)( 45,165)( 46,166)( 47,167)
( 48,168)( 49,169)( 50,170)( 51,171)( 52,172)( 53,173)( 54,174)( 55,175)
( 56,176)( 57,177)( 58,178)( 59,179)( 60,180)( 61,181)( 62,182)( 63,183)
( 64,184)( 65,185)( 66,186)( 67,187)( 68,188)( 69,189)( 70,190)( 71,191)
( 72,192)( 73,193)( 74,194)( 75,195)( 76,196)( 77,197)( 78,198)( 79,199)
( 80,200)( 81,201)( 82,202)( 83,203)( 84,204)( 85,205)( 86,206)( 87,207)
( 88,208)( 89,209)( 90,210)( 91,211)( 92,212)( 93,213)( 94,214)( 95,215)
( 96,216)( 97,217)( 98,218)( 99,219)(100,220)(101,221)(102,222)(103,223)
(104,224)(105,225)(106,226)(107,227)(108,228)(109,229)(110,230)(111,231)
(112,232)(113,233)(114,234)(115,235)(116,236)(117,237)(118,238)(119,239)
(120,240);
poly := sub<Sym(240)|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,
s1*s2*s3*s2*s1*s2*s3*s2, s2*s3*s2*s3*s2*s3*s2*s3,
s0*s1*s2*s1*s0*s1*s0*s1*s2*s1*s0*s1,
s1*s2*s1*s2*s1*s2*s1*s2*s1*s2*s1*s2,
s0*s1*s2*s1*s2*s1*s0*s1*s0*s2*s1*s0*s1*s2*s0*s1 >;

```
References : None.
to this polytope