#10538: Implementation of the classes ClusterSeed and Quiver
-----------------------------+----------------------------------------------
Reporter: stumpc5 | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-5.0
Component: combinatorics | Keywords: cluster algebra, quiver
Work_issues: | Upstream: N/A
Reviewer: | Author: Christian Stump
Merged: | Dependencies: #10527
-----------------------------+----------------------------------------------
Changes (by JStarx):
* status: needs_review => needs_info
Comment:
Is this dependent on anything other than #10527? After applying that and
this patch I get the following:
{{{
sage: S = ClusterSeed(['A',3])
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (398, 0))
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/Users/Starx/sage/devel/sage-main/<ipython console> in <module>()
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/combinat/cluster_algebra_quiver/cluster_seed.pyc in
__init__(self, data, frozen)
93 elif type( data ) in [list,tuple] and ( type( data[0] ) is
str or all(type( comp ) in [list,tuple] and type( comp[0] ) is str for
comp in data) ):
94 mutation_type = QuiverMutationType( data )
---> 95 quiver = mutation_type.standard_quiver()
96 self.__init__( quiver )
97
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/misc/cachefunc.pyc in __call__(self, *args, **kwds)
553 return self.cache[k]
554 except KeyError:
--> 555 w = self._cachedmethod._instance_call(self._instance,
*args, **kwds)
556 self.cache[k] = w
557 return w
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/misc/cachefunc.pyc in _instance_call(self, inst, *args,
**kwds)
776
777 """
--> 778 return self._cachedfunc.f(inst, *args, **kwds)
779
780 def _get_instance_cache(self, inst):
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/combinat/cluster_algebra_quiver/quiver_mutation_type.pyc in
standard_quiver(self)
1211 """
1212 from quiver import Quiver
-> 1213 Q = Quiver( self._digraph )
1214 Q._mutation_type = self
1215 return Q
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/combinat/cluster_algebra_quiver/quiver.pyc in __init__(self,
data, frozen)
161
162 M = _edge_list_to_matrix( dg.edge_iterator(), n, m )
--> 163 if not _principal_part(M).is_skew_symmetrizable(
positive=True ):
164 raise ValueError, "The input digraph must be skew-
symmetrizable"
165 self._digraph = dg
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/structure/element.so in
sage.structure.element.Element.__getattr__
(sage/structure/element.c:2884)()
/Users/Starx/sage/local/lib/python2.6/site-
packages/sage/structure/parent.so in
sage.structure.parent.getattr_from_other_class
(sage/structure/parent.c:3236)()
AttributeError: 'sage.matrix.matrix_integer_sparse.Matrix_integer_sparse'
object has no attribute 'is_skew_symmetrizable'
}}}
I think the patch was meant for 4.7.2, maybe it needs to be updated to
work with the current version of sage?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10538#comment:7>
Sage <http://www.sagemath.org>
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