X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo%2Feja%2FTODO;h=bb2b7f30069dda7ba5b1c63ec7062f1ab397c596;hb=0430a8642776e71ef0c26ab5e186f5a98a5a7433;hp=5307527b5285eb821f75b8e9dfa58b2d512c10a9;hpb=0378679ab4d3e52c08f126b681c20e9f9c5e9023;p=sage.d.git

diff --git a/mjo/eja/TODO b/mjo/eja/TODO
index 5307527..bb2b7f3 100644
--- a/mjo/eja/TODO
+++ b/mjo/eja/TODO
@@ -2,10 +2,16 @@
 
 2. Profile (and fix?) any remaining slow operations.
 
-3. Every once in a long while, the test
+3. When we take a Cartesian product involving a trivial algebra, we
+   could easily cache the identity and charpoly coefficients using
+   the nontrivial factor. On the other hand, it's nice that we can
+   test out some alternate code paths...
 
-       sage: set_random_seed()
-       sage: x = random_eja().random_element()
-       sage: x.is_invertible() == (x.det() != 0)
+4. Can we hit "x" with the deortho matrix and delegate to the
+   _rational_algebra to speed up minimal_polynomial?
 
-   in eja_element.py returns False.
+5. In CartesianProductEJA we already know the multiplication table and
+   inner product matrix. Refactor things until it's no longer
+   necessary to duplicate that work.
+
+6. Eliminate the matrix_space() override in CartesianProductEJA.