-  687  -d(u,,e)v -
  ql  -) -

3  inf  (u.e).
olnf(u,en
olnftu,en

lowtri(
36  7
30
367
2  d(u)
Dn  en)  sni

D(e,)  -  du,euu)
A  Taylor  expansion  about  0,  yields
Vn  D(6,)  =  Vn  D,  (0.)  +  VD  (8)Vn  (e,-,)  with
P
VD(8)  -1
dui
ni=l  ef
6  element  of  the  line  segment  L(0.,e.)
Using  the  expansion  of  equation  (2.6)  and  equation  (2.10)
one  finds
n
3lnf(u,e.)
+1
Vn  D  (8)  --A  (8)1
Vn  i=1  30
with  6  element  of  the  line  segment  L(e,,e.).

(3.1)
(3.2)
(3.3)
(3.4)
(3.5)