-7. Pass already_echelonized (default: False) and echelon_basis
- (default: None) into the subalgebra constructor. The value of
- already_echelonized can be passed to V.span_of_basis() to save
- some time, and usinf e.g. FreeModule_submodule_with_basis_field
- we may somehow be able to pass the echelon basis straight in to
- save time.
+5. Compute the scalar in the general natural_inner_product() for
+ matrices, so no overrides are necessary. Actually, this is
+ probably better implemented as a dimension_over_reals() method
+ that returns 1, 2, or 4.
+
+6. The main EJA element constructor is happy to convert between
+ e.g. HadamardEJA(3) and JordanSpinEJA(3).