In this paper, we present a new approach to solve the railway rescheduling problem. This problem deals with the reparation of a disturbed railway timetable after incidents in such a way to minimize the difference between the original plan and the new provisional plan. We use a mixed integer...

This paper deals with the problem of obtaining the minimum winning coalition and its stability level. The construction of a coalition is modeled using fuzzy sets by taking into account the position of the members on a set of political subjects of interest. Fuzzy sets allow to consider the...

During the life span of Spanish democracy, we have repeatedly observed many "puzzles" arising from the results of a general, state or municipal election, which, in turn, give way to governments based in partnerships of several political parties. In many democracies, it is a sine qua non...