amplify_bbopt.objective_example.goldstein_price_functionΒΆ goldstein_price_function(x0: float, x1: float) → floatΒΆ An example objective function (Goldstein-Price function). Yield the global minimum of 3 at (0, -1). Parameters: x0 (float) β A real number x1 (float) β A real number Returns: The function value. Return type: float