Min-max and min-max regret criteria are commonly used to define robust solutions. After motivating the use of these criteria, we present general results. Then, we survey complexity results for the min-max and min-max regret versions of some combinatorial optimization problems: shortest path,...

This paper deals with preference modeling. It concerns the concepts of discriminating thresholds as a tool to cope with the imperfect nature of knowledge in decision aiding. Such imperfect knowledge is related with the definition of each criterion as well as with the data we have to take into...

The interface in acoustically driven layered liquids, in an enclosed geometry, was found to be unstable at a critical value of the axial streaming velocity. Above this critical value, which depends on the system parameters, tiny, uncorrelated ripples were generated. Then, beyond a second, larger...