Trac #21992.22: expand TODO block: explain problem

sagemath · Jan 4, 2017 · 3e31602 · 3e31602
1 parent a915d56
commit 3e31602
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/sage/matrix/compute_J_ideal.py b/src/sage/matrix/compute_J_ideal.py
@@ -76,6 +76,14 @@
 
    Test code over PIDs other than ZZ.
 
+   This requires implementation of
+   :meth:`~sage.matrix.matrix_integer_dense.Matrix_integer_dense.frobenius`
+   over more general domains than ZZ.
+
+   Additionally, :func:`lifting` requires modification or a bug
+   needs fixing, see
+   `AskSage Question 35555 <https://ask.sagemath.org/question/35555/lifting-a-matrix-from-mathbbqyy-1/>`_.
+
 REFERENCES:
 
    [Ris2016]_, [HR2016]_