Every separable nonreflexive Banach space admits an equivalent norm such that the set of the weak-extreme points of the unit ball is discrete.

In this paper, applying two theorems of Ricceri and Bonanno, we will establish the existence of three weak solutions for a quasilinear elliptic system. Indeed, we will assign a differentiable nonlinear operator to a differential equation system such that the critical points of this operator are weak solutions of the system. In this paper, applying two theorems of R...

The Medical Association of Thailand invites its member to attend a meeting on the nation’s medical liability system(1). Since 1973, the number of malpractice suit went up from 250 to over 500 per year. Furthermore, the cost of the medical litigation and each malpractice suit is increasing(2). Besides, each Baht paid in damages is a Baht that otherwise could be spent on patient care, reducing th...

In this paper, we study the weak point matching problem for a given set of n points and a class of equilateral triangles. The problem is to find the maximum cardinality matching of the points using equilateral triangles such that each triangle contains exactly two points and each point lies at most in one triangle. Under the non-degeneracy assumption, we present an O(n) time algorithm using the...

In this paper an approach in data envelopment analysis dealing with evaluation of non – zero slacks was propounded. This approach intends that weight of inefficient and weak efficient points that have been evaluated as zero weight, be considered as positive weight, and also in this approach, the pareto efficiency evaluates the picture of this point. In this approach positive weights in the i...