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This volume contains several surveys focused on the ideas of approximate solutions, well-posedness and stability of problems in scalar and vector optimization, game theory and calculus of variations. These concepts are of particular interest in many fields of mathematics. The idea of stability goes back at least to J. Hadamard who introduced it in the setting of differential equations; the concept of well-posedness for minimum problems is more recent (the mid-sixties) and originates with A.N. Tykhonov. It turns out that there are connections between the two properties in the sense that a...

Il proliferare di pubblicazioni scientifiche e di conseguenza l'utilizzo di nuove molecole, meno tossiche, piu efficaci ma molto piu costose ha comportato e comportera in un breve futuro un aumento considerevole della spesa farmaceutica. E' quindi necessario e possibile spendere meglio senza pero pregiudicare la qualita delle prestazioni intervenendo sulla programmazione dei servizi, sulla capacita di governare le innovazioni tecnologiche e terapeutiche, sulla valutazione della qualita ma anche sulla razionalizzazione degli acquisti e sul controllo continuo dell'efficienza gestionale. Il...

One out of every five Latin Americans or around 130 million people have never known anything but poverty, subsisting on less than US$4-a-day throughout their lives. These are the regions chronically poor, who have remained so despite unprecedented inroads against poverty in Latin America and the Caribbean since the turn of the century. Left Behind: Chronic Poverty in Latin America and the Caribbean takes a closer look at the region's entrenched poor, who and where they are, and how existing policies need to change in order to effectively assist them. The book shows significant variations of...

This book deals mainly with the study of convex functions and their behavior from the point of view of stability with respect to perturbations. We shall consider convex functions from the most modern point of view: a function is de?ned to be convex whenever its epigraph, the set of the points lying above the graph, is a convex set. Thus many of its properties can be seen also as properties of a certain convex set related to it. Moreover, we shall consider extended real valued functions, i. e., functions taking possibly the values and +?. The reason for considering the value +? is the powerful...