invariant_theory package
I am trying to follow the tutorial on the invariant_theory package: http://www.sagemath.org/doc/reference...
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?
Exactly what version of Sage do you have installed? You need 5.7 or later to use this feature.