We propose a simple probability problem for undergraduate level. This involves different branches of Mathematics, such as Graph Theory, Linear Algebra or hypergeometric sums, hence it is quite suitable to be used Problem-Based Learning. In addition, the allows several variations so that may proposed groups students at same time.

In the present paper, we introduce and study a fuzzy vector equilibrium problem and prove some existence results with and without convexity assumptions by using some particular forms of results of textit{Kim} and textit{Lee} [W.K. Kim and K.H. Lee, Generalized fuzzy games and fuzzy equilibria, Fuzzy Sets and Systems, 122 (2001), 293-301] and textit{Tarafdar} [E. Tarafdar, Fixed point theorems i...

In many infeasible linear programs it is important to construct it to a feasible problem with a minimum pa-rameters changing corresponding to a given nonnegative vector. This paper defines a new inverse problem, called “inverse feasible problem”. For a given infeasible polyhedron and an n-vector a minimum perturba-tion on the parameters can be applied and then a feasible polyhedron is concluded.

Introduction: The Achilles tendon also named calcaneal tendon, can be subjected to tensile loads up 10 times the body weight. It is located on posterior aspect of lower leg and thickest tendon. This accounts for 20% all large injuries. There discussion which best treatment, among percutaneous repair has risk injuring sural nerve. When a sharp, explosive sudden force exerted rupture or tears occ...