Vu qu'il y a beaucoup de conditions imposées, il n'est pas toujours possible de trouver une solution de fonction en escaliers équiprobables de deux paliers en donnant les trois premiers moments .
Because there are lots of conditions imposed, it is not always possible to find a solution of equiprobable stairs of two levels function giving the first three moments.
Given that there are many conditions imposed, it is not always possible to find a solution based on equiprobable stairs two levels giving the first three times.
Given that there are a lot of conditions imposed, it is not always possible to find a solution to function in stairs each point of two levels by giving the first three times .