On Thu, 13 Mar 2014, Martin Albrecht wrote:
what happened to the Sage 2012 GSoC project on lattices described here:
http://gsoc-sage-lattices.blogspot.co.uk/
I don't know. But anyways, contact Nathan Lawless if you are going to do
something with lattices.
Sage way to generate semilattices is easy but slow. Even
[L for L in Posets(8) if L.is_meet_semilattice()]
takes few minutes, even there is only about 1000 semilattices with 8
elements. That's because Posets(n) actually generates digraphs and checks
which of them are posets.
Nathan send my code to generate them much faster. However, it is not
public.
--
Jori Mäntysalo
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