[r-t] Complexity of extents

[Andrew Johnson]

> From: Richard Smith <richard at ex-parrot.com>
> I'd been thinking about this myself, and I'm coming round to 
> the view that the question we should be asking is: does the 
> symmetry (or other structure) make it easier to get an 
> extent?  Palindromic symmetry certainly seems like it does, 
> as does an n-part structure.  Maybe glide symmetry does. 
> But when I try to get an extent with rotational symmetry, it 
> feels like I'm fighting against the symmetry rather than 
> utilising it.
> 
It's not an extent, but for rotational symmetry were
you thinking of compositions such as Ander's 5024 Bristol S.
Major?
http://www.math.ubc.ca/~holroyd/comps/b8.txt

Andrew

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