Hi...
I run the following lines of code.
gap> A:=[[0,1,0],[0,0,1],[1,0,0]]; B:=[[0,0,1],[0,1,0],[-1,0,0]];
C:=[[E(4),0,0],[0,E(4)^(-1),0],[0,0,1]];
gap> g2:=GroupWithGenerators([A,B,C]);
<matrix group with 3 generators>
gap> StructureDescription(g2);
recursion depth trap (5000)
at
if func( elm ) then
return true;
fi;
called from
ForAny( mat, function ( r )
return not IsPlistRep( r );
end ) called from
ac( i, g ) called from
func( elm ) called from
List( set, function ( i )
return ac( i, g );
end ) called from
act( b, elm ) called from
...
Entering break read-eval-print loop ...
you can 'quit;' to quit to outer loop, or
you may 'return;' to continue
brk>
But I can identify the group by doing:
gap> IdGroup(g2);
[ 96, 64 ]
I can generate the same group using a different set of generators. Then,
StructureDescription works fine.
Why is it that there is a problem with this set of generators? How can I bypass
this problem?
Krishna
Krishnamohan P
Graduate Student
IUCAA
Pune
India
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