F(t)=H(t)exp 
æ è 
ó õ W(t) dt 
ö ø 
for W=L t^{1}+Q' Î t^{1} M_{n}(K)[t^{1}]. 
y(x)=p(x)exp 
æ è 
ó õ u(x) dx 
ö ø 
for uÎK(x) and pÎK[x]^{n}. 
u=S 

(u)+R 

(u), with S_{x}_{0}(u)Î t^{1}K[t^{1}] and R_{x}_{0}(u)ÎK[[t]]. 
S_{0}(u)= 

 

and R_{0}(u)=5+5t+5t^{2}+··· 
E_{0}= 
ì í î 

 

, 

+ 

ü ý þ 
, E_{1}= 
ì í î 
0, 

ü ý þ 
, where a^{2}+7a2=0. 
u_{1}= 

 

+ 

and u_{2}= 

+ 


. 
R 

(U)=R 

(u)+(ln p)'=(ln z)' 
y=exp 
æ è 
ó õ S_{0}(u) dx 
ö ø 

. 
R_{0}(U)= 

= 

=  

', 
zexp 
æ ç ç è 
ó õ 

dx 
ö ÷ ÷ ø 
, for 0£ k£ q, 
This document was translated from L^{A}T_{E}X by H^{E}V^{E}A.