eja: remove a completed TODO.

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

diff --git a/mjo/eja/TODO b/mjo/eja/TODO
index 13b00ac6a3056eaf623ac5c2905be6c7d049706c..f2e71c8495cd140698d28a88ee515680a997c322 100644 (file)
--- a/mjo/eja/TODO
+++ b/mjo/eja/TODO
@@ -19,7 +19,8 @@ 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. Instead of storing a basis multiplication matrix, just make
    product_on_basis() a cached method and manually cache its
    entries. The cython cached method lookup should be faster than a
-   python-based matrix lookup anyway.
+   python-based matrix lookup anyway. NOTE: we should still be able
+   to recompute the table somehow. Is this worth it?
 
 7. What the ever-loving fuck is this shit?
 
@@ -33,5 +34,10 @@ 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
    we wouldn't need real embeddings at all. They might even be fricking
    vector spaces if I did that...
 
-9. Add HurwitzMatrixAlgebra subclass between MatrixAlgebra and
-   OctonionMatrixAlgebra.
+9. Every once in a long while, the test
+
+       sage: set_random_seed()
+       sage: x = random_eja().random_element()
+       sage: x.is_invertible() == (x.det() != 0)
+
+   in eja_element.py returns False.