mjo/matrix_vector: replace isomorphism with basis_representation().

[sage.d.git] / mjo / cone / doubly_nonnegative.py

diff --git a/mjo/cone/doubly_nonnegative.py b/mjo/cone/doubly_nonnegative.py
index 1fb350cb46559a55b982ee3de15678e02d5a04de..373557c6c72dde4974dfdce30efe435d0d526cc2 100644 (file)
--- a/mjo/cone/doubly_nonnegative.py
+++ b/mjo/cone/doubly_nonnegative.py
@@ -16,7 +16,7 @@ from sage.all import *
 from mjo.cone.symmetric_psd import (factor_psd,
                                     is_symmetric_psd,
                                     random_symmetric_psd)
-from mjo.matrix_vector import isomorphism
+from mjo.matrix_vector import basis_representation
 
 
 def is_doubly_nonnegative(A):
@@ -383,7 +383,7 @@ def is_extreme_doubly_nonnegative(A):
     # can't compute the dimension of a set of matrices anyway, so we
     # convert them all to vectors and just ask for the dimension of the
     # resulting vector space.
-    (phi, phi_inverse) = isomorphism(A.matrix_space())
+    (phi, phi_inverse) = basis_representation(A.matrix_space())
     vectors = map(phi,spanning_set)
 
     V = span(vectors, A.base_ring())