... the points A or C, and the values of the distance at the points A, C are greater than the values of the distance at the points E, H, I, we get the desiredstrict inequality and this part of the ... negative at the left-handside of α∗ and positive at the right-hand side of α∗.There are three different cases regarding the position of the point N (the intersection of the linethat passes ... fact,there may be cases in which the cardinality is not finite. However, as it can be seen in the nextsubsections, the theorem insures that in many instances in which the core is empty, the least...