Method __mul__

recipes/Python/580610_Auto_differentiation/recipe-580610.py:80–82

(u, v)

        return Num(float(u) - float(v), d(u) - d(v))

    def __mul__(u, v):
        u, v, du, dv = float(u), float(v), d(u), d(v)
        return Num(u * v, u * dv + v * du)

    def __truediv__(u, v):
        u, v, du, dv = float(u), float(v), d(u), d(v)