eja: add a TODO for the morning.

[sage.d.git] / mjo / eja / TODO

diff --git a/mjo/eja/TODO b/mjo/eja/TODO
index 17422851f81f5196cd47cc159004c326a848b115..39daf2a796c0d9d21c21057ae0899dacf4fbed89 100644 (file)
--- a/mjo/eja/TODO
+++ b/mjo/eja/TODO
@@ -27,8 +27,7 @@ sage: a0 = (1/4)*X[4]**2*X[6]**2 - (1/2)*X[2]*X[5]*X[6]**2 - (1/2)*X[3]*X[4]*X[6
 6. Can we convert the complex/quaternion algebras to avoid real-
    (un)embeddings? Quaternions would need their own
    QuaternionMatrixAlgebra, since Sage matrices have to have entries
-   in a commutative ring. Those and the octonion stuff could be moved
-   to hurwitz.py along with the HurwitzMatrixAlgebra.
+   in a commutative ring.
 
 7. Every once in a long while, the test
 
@@ -37,3 +36,7 @@ sage: a0 = (1/4)*X[4]**2*X[6]**2 - (1/2)*X[2]*X[5]*X[6]**2 - (1/2)*X[3]*X[4]*X[6
        sage: x.is_invertible() == (x.det() != 0)
 
    in eja_element.py returns False.
+
+8. The definition of product_on_basis() and the element constructor
+   for MatrixAlgebra are totally wrong. There's no reason to expect
+   a product of monomials to again be plus/minus a monomial.