#10692: new method RootSystem.root_poset
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Reporter: stumpc5 | Owner: sage-combinat
Type: enhancement | Status: new
Priority: major | Milestone:
Component: combinatorics | Keywords: root system, root poset
Author: Christian Stump | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by stumpc5):
> - I would prefer to call the method as
> RootSystem(["A",3]).root_lattice().root_poset() (possibly with a
shortcut from root system, to possibly let the user choose in which
realization the roots are returned
I only moved the method to the root lattice realization for now.
> - The code could be written generically for any RootLatticeRealization
by computing scalar products with coweights.
this is still not done.
> - Even without using scalar products, there should be no need to use
dict's.
done.
> - The root comparison function could be extracted as a separate method,
as it could be of more general use
done, maybe there should be a better name, and it might be good to exclude
negative roots.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10692#comment:2>
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