Chiral Polytope of Type {12,18}
This page is part of the Atlas of Small Chiral Polytopes
Regular Cover :{12,18}*1296e with group SmallGroup(1296,891) = (C3 x C9) ⋊ (S3 x D4)of order 1296
Rank : 3
Schlafli Type : {12,18}
Rotation Group : SmallGroup(216,62) = ((C9 ⋊ C4) ⋊ C2) ⋊ C3 of order 216
Number of vertices, edges, etc : 12, 108, 18
If Aut({12,18}*1296e)=<s0, s1, s2>, then this chiral polytope is ({12,18}*1296e)/N, where
N=<s0*s1*s0*s1*s2*s1*s0*s2*s1*s0*s2*s1*s2*s1*s2*s1*s2*s1> of order 3
Facet : (Regular) 12-gon
Vertex Figure : (Regular) 18-gon
Finitely Presented Group Representation of the Rotation Group(GAP) :
F := FreeGroup("sig1","sig2");;
sig1 := F.1;; sig2 := F.2;;
rels := [ sig1^-1*sig2^-1*sig1^-1*sig2^-1, sig1*sig2^-1*sig1^-1*sig2*sig1^-1*sig2*sig2*sig1*sig1*sig1,
sig2*sig1^-1*sig2^-1*sig2^-1*sig2^-1*sig2^-1*sig1*sig1*sig2^-1*sig1 ];;
rotpoly := F / rels;;
Finitely Presented Group Representation of the Rotation Group (Magma) :
rotpoly<sig1,sig2> := Group< sig1,sig2 | sig1^-1*sig2^-1*sig1^-1*sig2^-1, sig1*sig2^-1*sig1^-1*sig2*sig1^-1*sig2*sig2*sig1*sig1*sig1,
sig2*sig1^-1*sig2^-1*sig2^-1*sig2^-1*sig2^-1*sig1*sig1*sig2^-1*sig1 >;