Hi Johannes,
On Fri, Jul 09, 2010 at 03:11:39PM +0200, Johannes wrote:
> im just playing around with sage and LatticePolytopes and im wondering
> why theres no __eq__ implementet for them.
> if i have this code:
> s1 = LatteciPolytope(matrix([[1,0,-1],[0,1,-1]])
> s2 = LatteciPolytope(matrix([[1,0,-1],[0,1,-1]])
>
> then s1 == s2 evals to false.
> thats right in the sentence of ref-equality but in my eyes two polytopes
> are equal, if they live in the same space (in this case, on the same
> Lattice) and have the same edges.
> Is there any reason, why its not implemented that way?
I am forwarding this to the author, Andrey, since I don't remember if
he is on sage-combinat-devel.
By the way, Andrey, would you consider that the elements of a
LatticePolytope are its integer points? If yes, could you add aliases:
- cardinality -> npoints
- points -> list
for consistency with other FiniteEnumeratedSets? (and it would be even
better if LatticePolytope was in that category).
Should I open a ticket about this?
Cheers,
Nicolas
--
Nicolas M. Thiéry "Isil"
http://Nicolas.Thiery.name/
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