+ /**
+ * This method initializes the difference with an operation with two integer
+ * parameters. It is applicable to the following operations:
+ * <UL>
+ * <LI>Join (with a list of int arguments)</LI>
+ * </UL>
+ */
+ bool init(const CurveCreator_Curve *theCurve,
+ const CurveCreator_Operation::Type theType,
+ const std::list<int>& theParams);
+