Dear Nicolas,
Impressive, your work on posets!
...
- Currently P.hasse_diagram() returns a graph G whose nodes are the
elements of P (wrapped as elements of P; so one needs to do
x.element to actually get the original element). This graph is still
in the HasseDiagram class. The issue is that HasseDiagram's expect
their vertices to be 0,1,...,n-1, so most of the extra methods just
break.
Option 1: P.hasse_diagram() returns a plain digraph
Option 2: P.hasse_diagram() returns the internal HasseDiagram, with
vertices labelled 0,1,...,n
What do you prefer? I personally vote for 2; as a user, that's what
I would expect.
I would probably prefer 2 as well.
Another question is whether we want the vertices P.hasse_diagram()
to be wrapped or not. And if we are unhappy with the situation, is
still time to change this?
If it is possible not to wrap them, I think this would be good.
At least I ran into some problems when playing with posets in the past.
Cheers,
Anne
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