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Polytope of Type {18,2,4,2}
This page is part of the Atlas of Small Regular Polytopes
Atlas Canonical Name : {18,2,4,2}*576
if this polytope has a name.
Group : SmallGroup(576,5012)
Rank : 5
Schlafli Type : {18,2,4,2}
Number of vertices, edges, etc : 18, 18, 4, 4, 2
Order of s0s1s2s3s4 : 36
Order of s0s1s2s3s4s3s2s1 : 2
Special Properties :
Degenerate
Universal
Orientable
Flat
Related Polytopes :
Facet
Vertex Figure
Dual
Facet Of :
{18,2,4,2,2} of size 1152
{18,2,4,2,3} of size 1728
Vertex Figure Of :
{2,18,2,4,2} of size 1152
Quotients (Maximal Quotients in Boldface) :
2-fold quotients : {9,2,4,2}*288, {18,2,2,2}*288
3-fold quotients : {6,2,4,2}*192
4-fold quotients : {9,2,2,2}*144
6-fold quotients : {3,2,4,2}*96, {6,2,2,2}*96
9-fold quotients : {2,2,4,2}*64
12-fold quotients : {3,2,2,2}*48
18-fold quotients : {2,2,2,2}*32
Covers (Minimal Covers in Boldface) :
2-fold covers : {18,2,4,4}*1152, {18,4,4,2}*1152, {36,2,4,2}*1152, {18,2,8,2}*1152
3-fold covers : {54,2,4,2}*1728, {18,2,12,2}*1728, {18,2,4,6}*1728a, {18,6,4,2}*1728a, {18,6,4,2}*1728b
Permutation Representation (GAP) :
s0 := ( 3, 4)( 5, 6)( 7, 8)( 9,10)(11,12)(13,14)(15,16)(17,18);;
s1 := ( 1, 5)( 2, 3)( 4, 9)( 6, 7)( 8,13)(10,11)(12,17)(14,15)(16,18);;
s2 := (20,21);;
s3 := (19,20)(21,22);;
s4 := (23,24);;
poly := Group([s0,s1,s2,s3,s4]);;
Finitely Presented Group Representation (GAP) :
F := FreeGroup("s0","s1","s2","s3","s4");;
s0 := F.1;; s1 := F.2;; s2 := F.3;; s3 := F.4;; s4 := F.5;;
rels := [ s0*s0, s1*s1, s2*s2, s3*s3, s4*s4, s0*s2*s0*s2,
s1*s2*s1*s2, s0*s3*s0*s3, s1*s3*s1*s3,
s0*s4*s0*s4, s1*s4*s1*s4, s2*s4*s2*s4,
s3*s4*s3*s4, 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(24)!( 3, 4)( 5, 6)( 7, 8)( 9,10)(11,12)(13,14)(15,16)(17,18);
s1 := Sym(24)!( 1, 5)( 2, 3)( 4, 9)( 6, 7)( 8,13)(10,11)(12,17)(14,15)(16,18);
s2 := Sym(24)!(20,21);
s3 := Sym(24)!(19,20)(21,22);
s4 := Sym(24)!(23,24);
poly := sub<Sym(24)|s0,s1,s2,s3,s4>;
Finitely Presented Group Representation (Magma) :
poly<s0,s1,s2,s3,s4> := Group< s0,s1,s2,s3,s4 | s0*s0, s1*s1, s2*s2,
s3*s3, s4*s4, s0*s2*s0*s2, s1*s2*s1*s2,
s0*s3*s0*s3, s1*s3*s1*s3, s0*s4*s0*s4,
s1*s4*s1*s4, s2*s4*s2*s4, s3*s4*s3*s4,
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 >;
to this polytope