Polytope of Type {8,4}

Play with this polytope as a twisty puzzle

This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {8,4}*256a
if this polytope has a name.
Group : SmallGroup(256,5078)
Rank : 3
Schlafli Type : {8,4}
Number of vertices, edges, etc : 32, 64, 16
Order of s0s1s2 : 8
Order of s0s1s2s1 : 4
Special Properties :
   Compact Hyperbolic Quotient
   Locally Spherical
   Orientable
   Self-Petrie
Related Polytopes :
   Facet
   Vertex Figure
   Dual
   Petrial
   Skewing Operation
Facet Of :
   {8,4,2} of size 512
Vertex Figure Of :
   {2,8,4} of size 512
Quotients (Maximal Quotients in Boldface) :
   2-fold quotients : {8,4}*128a, {4,4}*128, {8,4}*128b
   4-fold quotients : {8,4}*64a, {8,4}*64b, {4,4}*64
   8-fold quotients : {4,4}*32, {8,2}*32
   16-fold quotients : {2,4}*16, {4,2}*16
   32-fold quotients : {2,2}*8
Covers (Minimal Covers in Boldface) :
   2-fold covers : {16,4}*512a, {8,8}*512c, {8,4}*512a, {8,8}*512f, {16,4}*512b, {8,4}*512b, {8,4}*512c, {8,8}*512l, {8,8}*512n, {16,4}*512c, {16,4}*512d
   3-fold covers : {8,12}*768a, {24,4}*768a
   5-fold covers : {8,20}*1280a, {40,4}*1280a
   7-fold covers : {8,28}*1792a, {56,4}*1792a
Irregular Quotients (of which this is a minimal cover):
   P/N, where N=<s0*s1*s0*s1*s0*s2*s1*s0*s1*s2> of order 2.
      8 facets:
         8 of {8}*16
      16 vertex figures:
         16 of {4}*8
   P/N, where N=<s0*s1*s0*s2*s1*s0*s2*s1*s0*s2*s1> of order 2.
      8 facets:
         8 of {8}*16
      16 vertex figures:
         16 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s1*s2> of order 2.
      8 facets:
         8 of {8}*16
      16 vertex figures:
         16 of {4}*8
   P/N, where N=<s0*s1*s0*s1*s2*s1*s0*s2*s1*s0*s1*s2*s1> of order 2.
      8 facets:
         8 of {8}*16
      16 vertex figures:
         16 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s2*s1*s0*s1*s2*s1*s2> of order 2.
      8 facets:
         8 of {8}*16
      16 vertex figures:
         16 of {4}*8
   P/N, where N=<s1*s2*s1*s2> of order 2.
      8 facets:
         8 of {8}*16
      20 vertex figures:
         8 of {2}*4
         12 of {4}*8
   P/N, where N=<s1*s2*s1*s2, s1*s0*s1*s2*s1*s0*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      12 vertex figures:
         8 of {2}*4
         4 of {4}*8
   P/N, where N=<s1*s2*s1*s2, s0*s1*s0*s1*s2*s1*s0*s2*s1*s0*s2> of order 4.
      4 facets:
         4 of {8}*16
      10 vertex figures:
         4 of {2}*4
         6 of {4}*8
   P/N, where N=<s0*s1*s0*s1*s0*s2*s1*s0*s1*s2, s0*s1*s0*s2*s1*s0*s1*s0*s2*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s1*s2, s0*s1*s0*s2*s1*s0*s1*s0*s2*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8
   P/N, where N=<s1*s2*s1*s2, s0*s1*s0*s2*s1*s0*s2*s1*s0*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      10 vertex figures:
         4 of {2}*4
         6 of {4}*8
   P/N, where N=<s0*s1*s0*s2*s1*s0*s1*s2*s1, s0*s1*s0*s1*s0*s2*s1*s0*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s1*s2, s0*s1*s2*s1*s0*s1*s2*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s1*s2, s0*s1*s2*s1*s0*s1*s0*s2*s1> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8
   P/N, where N=<s1*s0*s1*s2*s1*s0*s1*s2, s0*s1*s2*s1*s0*s1*s0*s2*s1*s2> of order 4.
      4 facets:
         4 of {8}*16
      8 vertex figures:
         8 of {4}*8

Permutation Representation (GAP) : 
s0 := (  1, 65)(  2, 66)(  3, 67)(  4, 68)(  5, 69)(  6, 70)(  7, 71)(  8, 72)(  9, 76)( 10, 75)( 11, 74)( 12, 73)( 13, 80)( 14, 79)( 15, 78)( 16, 77)( 17, 85)( 18, 86)( 19, 87)( 20, 88)( 21, 81)( 22, 82)( 23, 83)( 24, 84)( 25, 96)( 26, 95)( 27, 94)( 28, 93)( 29, 92)( 30, 91)( 31, 90)( 32, 89)( 33, 97)( 34, 98)( 35, 99)( 36,100)( 37,101)( 38,102)( 39,103)( 40,104)( 41,108)( 42,107)( 43,106)( 44,105)( 45,112)( 46,111)( 47,110)( 48,109)( 49,117)( 50,118)( 51,119)( 52,120)( 53,113)( 54,114)( 55,115)( 56,116)( 57,128)( 58,127)( 59,126)( 60,125)( 61,124)( 62,123)( 63,122)( 64,121);;
s1 := (  3,  4)(  7,  8)( 11, 12)( 15, 16)( 17, 21)( 18, 22)( 19, 24)( 20, 23)( 25, 29)( 26, 30)( 27, 32)( 28, 31)( 33, 41)( 34, 42)( 35, 44)( 36, 43)( 37, 45)( 38, 46)( 39, 48)( 40, 47)( 49, 62)( 50, 61)( 51, 63)( 52, 64)( 53, 58)( 54, 57)( 55, 59)( 56, 60)( 65, 81)( 66, 82)( 67, 84)( 68, 83)( 69, 85)( 70, 86)( 71, 88)( 72, 87)( 73, 89)( 74, 90)( 75, 92)( 76, 91)( 77, 93)( 78, 94)( 79, 96)( 80, 95)( 97,123)( 98,124)( 99,122)(100,121)(101,127)(102,128)(103,126)(104,125)(105,115)(106,116)(107,114)(108,113)(109,119)(110,120)(111,118)(112,117);;
s2 := (  1, 33)(  2, 34)(  3, 35)(  4, 36)(  5, 37)(  6, 38)(  7, 39)(  8, 40)(  9, 41)( 10, 42)( 11, 43)( 12, 44)( 13, 45)( 14, 46)( 15, 47)( 16, 48)( 17, 51)( 18, 52)( 19, 49)( 20, 50)( 21, 55)( 22, 56)( 23, 53)( 24, 54)( 25, 59)( 26, 60)( 27, 57)( 28, 58)( 29, 63)( 30, 64)( 31, 61)( 32, 62)( 65, 97)( 66, 98)( 67, 99)( 68,100)( 69,101)( 70,102)( 71,103)( 72,104)( 73,105)( 74,106)( 75,107)( 76,108)( 77,109)( 78,110)( 79,111)( 80,112)( 81,115)( 82,116)( 83,113)( 84,114)( 85,119)( 86,120)( 87,117)( 88,118)( 89,123)( 90,124)( 91,121)( 92,122)( 93,127)( 94,128)( 95,125)( 96,126);;
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, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s0*s1*s0*s1*s2*s1*s0*s1*s0*s1*s0*s1*s2*s1, 
s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s2*s1 ];;
poly := F / rels;;
Permutation Representation (Magma) : 
s0 := Sym(128)!(  1, 65)(  2, 66)(  3, 67)(  4, 68)(  5, 69)(  6, 70)(  7, 71)(  8, 72)(  9, 76)( 10, 75)( 11, 74)( 12, 73)( 13, 80)( 14, 79)( 15, 78)( 16, 77)( 17, 85)( 18, 86)( 19, 87)( 20, 88)( 21, 81)( 22, 82)( 23, 83)( 24, 84)( 25, 96)( 26, 95)( 27, 94)( 28, 93)( 29, 92)( 30, 91)( 31, 90)( 32, 89)( 33, 97)( 34, 98)( 35, 99)( 36,100)( 37,101)( 38,102)( 39,103)( 40,104)( 41,108)( 42,107)( 43,106)( 44,105)( 45,112)( 46,111)( 47,110)( 48,109)( 49,117)( 50,118)( 51,119)( 52,120)( 53,113)( 54,114)( 55,115)( 56,116)( 57,128)( 58,127)( 59,126)( 60,125)( 61,124)( 62,123)( 63,122)( 64,121);
s1 := Sym(128)!(  3,  4)(  7,  8)( 11, 12)( 15, 16)( 17, 21)( 18, 22)( 19, 24)( 20, 23)( 25, 29)( 26, 30)( 27, 32)( 28, 31)( 33, 41)( 34, 42)( 35, 44)( 36, 43)( 37, 45)( 38, 46)( 39, 48)( 40, 47)( 49, 62)( 50, 61)( 51, 63)( 52, 64)( 53, 58)( 54, 57)( 55, 59)( 56, 60)( 65, 81)( 66, 82)( 67, 84)( 68, 83)( 69, 85)( 70, 86)( 71, 88)( 72, 87)( 73, 89)( 74, 90)( 75, 92)( 76, 91)( 77, 93)( 78, 94)( 79, 96)( 80, 95)( 97,123)( 98,124)( 99,122)(100,121)(101,127)(102,128)(103,126)(104,125)(105,115)(106,116)(107,114)(108,113)(109,119)(110,120)(111,118)(112,117);
s2 := Sym(128)!(  1, 33)(  2, 34)(  3, 35)(  4, 36)(  5, 37)(  6, 38)(  7, 39)(  8, 40)(  9, 41)( 10, 42)( 11, 43)( 12, 44)( 13, 45)( 14, 46)( 15, 47)( 16, 48)( 17, 51)( 18, 52)( 19, 49)( 20, 50)( 21, 55)( 22, 56)( 23, 53)( 24, 54)( 25, 59)( 26, 60)( 27, 57)( 28, 58)( 29, 63)( 30, 64)( 31, 61)( 32, 62)( 65, 97)( 66, 98)( 67, 99)( 68,100)( 69,101)( 70,102)( 71,103)( 72,104)( 73,105)( 74,106)( 75,107)( 76,108)( 77,109)( 78,110)( 79,111)( 80,112)( 81,115)( 82,116)( 83,113)( 84,114)( 85,119)( 86,120)( 87,117)( 88,118)( 89,123)( 90,124)( 91,121)( 92,122)( 93,127)( 94,128)( 95,125)( 96,126);
poly := sub<Sym(128)|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, 
s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1*s0*s1, 
s0*s1*s0*s1*s0*s1*s2*s1*s0*s1*s0*s1*s0*s1*s2*s1, 
s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s2*s1*s0*s1*s2*s1 >;
References : None.
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