In a multicriteria decision problem it may happen that the preference of the decision-maker on some criterion is modeled by means of a semiorder structure. If the available information is qualitative, one often needs a numerical representation of the semiorder. We investigate the set of...

Radioactive waste management is an important issue for every electronuclear programme. A particular problem is to know how to finance the waste disposal: indeed, the time span between the electricity production itself and the final disposal in geological formations can represent decades. The...