#5879: [with patch, favorable review] Added crystal of letters for type E
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Reporter: aschilling | Owner: aschilling
Type: enhancement | Status: new
Priority: major | Milestone: sage-3.4.2
Component: combinatorics | Keywords: combinat, crystals
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Comment(by aschilling):
> What is the logic of the representations of the elements? That is, why
[-5,2,6]?
The nodes of this crystal are labeled by their weights. [-5,2,6] indicates
that
a 5-arrow is coming in, and a 2-arrow and 6-arrow is leaving the vertex.
I now also added a __repr__ method that allows for concise printing of the
nodes by
+abcdefghijklmnopqrstuvwxyz and -ABCDEFGHIJKLMNOPQRSTUVWXYZ in the dual
crystal.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5879#comment:4>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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