X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo%2Feja%2FTODO;h=bde3e3bb767b5fbcd9bc34971b34cf0abdaeb1dc;hb=3baadd6fb5c765caab2bd57d1d6ed764b03d53b3;hp=fe18d5634835c97dcc1ee635c4fadecab25787ea;hpb=3cd987f3ace9517518510e985eb7d1996a924a68;p=sage.d.git

diff --git a/mjo/eja/TODO b/mjo/eja/TODO
index fe18d56..bde3e3b 100644
--- a/mjo/eja/TODO
+++ b/mjo/eja/TODO
@@ -1,10 +1,7 @@
-1. Finish CartesianProductEJA: add to_matrix(), random_instance(),
-   one()... methods. This will require rethinking what a "matrix
-   representation" and "matrix space" means for a cartesian product
-   algebra. Do we want our matrix basis to consist of ordered pairs
-   (or triples, or...)? Should the matrix_space() of the algebra be
-   the cartesian product of the factors' matrix spaces? Can we just
-   fix the matrix basis/space after we call the FDEJA initializer?
+1. Finish CartesianProductEJA: add to_matrix(), random_instance(),...
+   methods. I guess we should create a separate class hierarchy for
+   Cartesian products of RationalBasisEJA? That way we get fast
+   charpoly and random_instance() defined...
 
 2. Add references and start citing them.
 
@@ -23,3 +20,6 @@ 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. Profile the construction of "large" matrix algebras (like the
    15-dimensional QuaternionHermitianAlgebra(3)) to find out why
    they're so slow.
+
+7. Printing of Cartesian product subalgebrasis wrong (it prints the
+   superalgebra).