trac #16352 more 'graded' in root_lattice_realizations.py

sagemath · Apr 23, 2015 · 0beb042 · 0beb042
1 parent 1a1a6cc
commit 0beb042
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/sage/combinat/root_system/root_lattice_realizations.py b/src/sage/combinat/root_system/root_lattice_realizations.py
@@ -789,7 +789,7 @@ def positive_real_roots(self):
             """
             if self.cartan_type().is_finite():
                 return tuple(RecursivelyEnumeratedSet(self.simple_roots(),
-                    attrcall('pred'), structure=None,
+                    attrcall('pred'), structure='graded',
                     enumeration='breadth'))
             if not self.cartan_type().is_affine():
                 raise NotImplementedError("only implemented for finite and affine Cartan types")
@@ -938,7 +938,7 @@ def parabolic_covers(alpha):
 
             generators = [x for x in self.simple_roots() if x.is_parabolic_root(index_set)]
             return RecursivelyEnumeratedSet(generators, parabolic_covers,
-                    structure=None, enumeration='breadth')
+                    structure='graded', enumeration='breadth')
 
         @cached_method
         def positive_roots_nonparabolic(self, index_set = None):