-4. Implement the octonion simple EJA.
-
-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().