Now that we're using span_of_basis() everywhere instead of accepting
whatever reordering span() gives us, this output has changed (harmlessly).
sage: K.vector_space()
Vector space of degree 6 and dimension 3 over Rational Field
User basis matrix:
sage: K.vector_space()
Vector space of degree 6 and dimension 3 over Rational Field
User basis matrix:
sage: (x^1).to_vector()
(0, 1, 2, 3, 4, 5)
sage: (x^2).to_vector()
sage: (x^1).to_vector()
(0, 1, 2, 3, 4, 5)
sage: (x^2).to_vector()
- (5, 11, 14, 26, 34, 45)
+ (10, 14, 21, 19, 31, 50)
"""
return self._vector_space
"""
return self._vector_space