I am trying to follow the tutorial on the invariant_theory package: http://www.sagemath.org/doc/reference/sage/rings/invariant_theory.html
I asked sage to execute the first example:
sage: R.<x,y> = QQ[]
sage: q = x^4 + y^4
sage: quartic = invariant_theory.binary_quartic(q); quartic
But received the following error: Traceback (click to the left of this block for traceback) ... NameError: name 'invariant_theory' is not defined
I have the newest version of sage installed. What's going wrong here?
