X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo%2Feja%2Feja_element.py;h=81c2b54fca757f0696468b5c450a6dda674a0f7a;hb=78bee5c30c1cd2828d9834fc7d652db21331d4fe;hp=9a770ae5f68b3e19f3946ca7716f299a3ff82685;hpb=9efefa3e54fc3e69e3f2c78457d50127a7a10131;p=sage.d.git

diff --git a/mjo/eja/eja_element.py b/mjo/eja/eja_element.py
index 9a770ae..81c2b54 100644
--- a/mjo/eja/eja_element.py
+++ b/mjo/eja/eja_element.py
@@ -664,7 +664,7 @@ class FiniteDimensionalEJAElement(IndexedFreeModuleElement):
         element should always be in terms of minimal idempotents::
 
             sage: J = JordanSpinEJA(4)
-            sage: x = sum( i*J.gens()[i] for i in range(len(J.gens())) )
+            sage: x = sum( i*J.monomial(i) for i in range(len(J.gens())) )
             sage: x.is_regular()
             True
             sage: [ c.is_primitive_idempotent()
@@ -1125,14 +1125,13 @@ class FiniteDimensionalEJAElement(IndexedFreeModuleElement):
         B = self.parent().matrix_basis()
         W = self.parent().matrix_space()
 
-        if self.parent()._matrix_basis_is_cartesian:
+        if hasattr(W, 'cartesian_factors'):
             # Aaaaand linear combinations don't work in Cartesian
-            # product spaces, even though they provide a method
-            # with that name. This is special-cased because the
+            # product spaces, even though they provide a method with
+            # that name. This is hidden behind an "if" because the
             # _scale() function is slow.
             pairs = zip(B, self.to_vector())
-            return sum( ( _scale(b, alpha) for (b,alpha) in pairs ),
-                        W.zero())
+            return W.sum( _scale(b, alpha) for (b,alpha) in pairs )
         else:
             # This is just a manual "from_vector()", but of course
             # matrix spaces aren't vector spaces in sage, so they