eja: begin working on a new constructor.

[sage.d.git] / mjo / eja / eja_utils.py

diff --git a/mjo/eja/eja_utils.py b/mjo/eja/eja_utils.py
index b6b0a0327c19842ce654023b00bf6e0b9af539a1..cbbf1e3a7bb0f1f66c9820121831d09d76895751 100644 (file)
--- a/mjo/eja/eja_utils.py
+++ b/mjo/eja/eja_utils.py
@@ -1,4 +1,9 @@
+from sage.functions.other import sqrt
+from sage.matrix.constructor import matrix
 from sage.modules.free_module_element import vector
 
 def _mat2vec(m):
         return vector(m.base_ring(), m.list())
+
+def _vec2mat(v):
+        return matrix(v.base_ring(), sqrt(v.degree()), v.list())