def standardise(self , other):

    if len(self.ListeMonomes) != 

            len(other.ListeMonomes):

        if len(self.ListeMonomes) == max( len(self.ListeMonomes) , len(other.ListeMonomes) ):

            for i in range(len(self.ListeMonomes)-len(other.ListeMonomes)):

                other.ListeMonomes += [ monome(0 , len(other.ListeMonomes) + i) ]

        else:

            for i in range(len(other.ListeMonomes)-len(self.ListeMonomes)):

                self.ListeMonomes += [ monome(0 , len(self.ListeMonomes) + i) ]

        

    P = [m.coef for m in self.ListeMonomes]

    Q = [m.coef for m in other.ListeMonomes]

    return polynome(*P) , polynome(*Q)

