m
vi ( j ) �ul -i g i ( j ) = ul g 0 ( j ) + ul -1 g1( j ) + +ul - m g m ( j )
      i=0
m = max K i
       1��
         i k
            k
V ( D)�u (i )( D n )g i ( D )
           i =1
gi ( D) = gi (1) ( D n ) + Dgi (2) ( D n ) + D n -1 gi ( n -1) ( D n )
K = �i =1 K i
                k
(u l -1
       (1)
           u
           l -2
                (1)
                    u
                    l -K 1
                          (1)
                             ul -1
                                  (2)
                                      u
                                      l -2
                                           (2)
                                               u
                                               l - K1
                                                      (2)
                                                          u
                                                          l -1
                                                              (k)
                                                                   u
                                                                  l -2
                                                                       (k)
                                                                               u
                                                                           l -Kk
                                                                                 (k)
                                                                                       )
A( X ) = �i Fi D i