6. The main EJA element constructor is happy to convert between
e.g. HadamardEJA(3) and JordanSpinEJA(3).
-
-7. Figure out if CombinatorialFreeModule's use of IndexedGenerators
- can be used to replace the matrix_basis().
-
-8. Move the "field" argument to a keyword after basis, jp, and ip.