#14610: Energy function for level zero LS paths for all types
-------------------------------------+-------------------------------------
Reporter: mshimo | Owner: mshimo
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-5.12
Component: combinatorics | Resolution:
Keywords: crystal graph, | Merged in:
days49 | Reviewers: Anne Schilling, Mark
Authors: Mark Shimozono, | Shimozono, Ben Salisbury
Anne Schilling | Work issues:
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Changes (by bsalisbury1):
* status: needs_review => positive_review
Comment:
Here is the new output for the above situation:
{{{
sage: RootSystem(['D',2]).root_lattice().simple_root(1).is_short_root()
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
<ipython-input-1-31128c2ac44d> in <module>()
----> 1
RootSystem(['D',Integer(2)]).root_lattice().simple_root(Integer(1)).is_short_root()
/Users/salis1bt/sage-5.12.beta0/local/lib/python2.7/site-
packages/sage/combinat/root_system/root_lattice_realizations.pyc in
is_short_root(self)
3291 ct = self.parent().cartan_type()
3292 if not ct.is_irreducible():
-> 3293 raise ValueError, "Cartan type needs to be
irreducible!"
3294 if not ct.is_finite():
3295 raise NotImplementedError, "Implemented only for
irreducible finite root systems"
ValueError: Cartan type needs to be irreducible!
}}}
All looks good to me.
{{{
----------------------------------------------------------------------
All tests passed!
----------------------------------------------------------------------
Total time for all tests: 1835.0 seconds
cpu time: 5844.4 seconds
cumulative wall time: 7022.8 seconds
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/14610#comment:15>
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