4. Implement the octonion simple EJA.
-5. Factor out the Jordan axiom and norm tests once all of the
- algebras pass.
+5. Factor out the unit-norm basis (and operator symmetry) tests once
+ all of the algebras pass.
+
+6. Override inner_product(), _max_test_case_size(), et cetera in
+ DirectSumEJA.
+
+7. Switch to QQ in *all* algebras for _charpoly_coefficients().