6. Instead of storing a basis multiplication matrix, just make
product_on_basis() a cached method and manually cache its
entries. The cython cached method lookup should be faster than a
- python-based matrix lookup anyway.
+ python-based matrix lookup anyway. NOTE: we should still be able
+ to recompute the table somehow. Is this worth it?
7. What the ever-loving fuck is this shit?
9. Add HurwitzMatrixAlgebra subclass between MatrixAlgebra and
OctonionMatrixAlgebra.
+
+10. Every once in a long while, the test
+
+ sage: set_random_seed()
+ sage: x = random_eja().random_element()
+ sage: x.is_invertible() == (x.det() != 0)
+
+ in eja_element.py returns False.