1 0. Add tests for orthogonality in the Peirce decomposition.
3 1. Add CartesianProductEJA.
5 2. Check the axioms in the constructor when check != False?
7 3. Add references and start citing them.
9 4. Implement the octonion simple EJA.
11 5. Factor out the unit-norm basis (and operator symmetry) tests once
12 all of the algebras pass.