%  
%  $BMzNr(B  2004/08/14  $B?y;39L0lO/(B: $B:n@.3+;O(B
%        2004/09/03  $B>.9b@5;L(B, $BKL<iB@0l(B
%
\section{$B6-3&>r7o(B}

$B$3$3$G$ON%;62=$7$?JQ?t$KBP$9$k6-3&>r7o$NM?$(J}$r$^$H$a$k(B. $B9MN8$9$k6-3&>r(B
$B7o$O(B, $B<~4|6-3&>r7o(B, $B6-3&$G$9$Y$j$J$7>r7o$H1~NO$J$7>r7o$G$"$k(B. 

\subsection{$B<~4|6-3&>r7o$NM?$(J}(B}

$BNc$H$7$F(B, $x$ $BJ}8~%U%i%C%/%93J;RE@$KG[CV$5$l$?JQ?t(B $u_{i(u),k}$ $B$r9M$($k(B. 
$B7W;;NN0hFb$N(B $x$ $BJ}8~$NE:;z$r(B $1(u)\sim im(u)$ $B$H$7(B, $B8RBeItJ,$N3J;RE@?t(B
$B$r(B $2$ $B$H$9$k(B(\Dfigref{num}$B;2>H(B).  $B$3$N$H$-<~4|6-3&>r7o$O0J2<$N$h$&$KM?(B
$B$($i$l$k(B.
%
\begin{eqnarray}
 &&u_{0(u), k} = u_{im(u), k} \\
 &&u_{-1(u), k} = u_{im-1(u), k} \\
 &&u_{im+1(u), k} = u_{1(u), k} \\
 &&u_{im+2(u), k} = u_{2(u), k}
\end{eqnarray}
%
$B$?$@$7(B $k$ $B$OG$0U$N@0?t$G$"$j(B, $B$=$NHO0O$O(B $-1 \leq k \leq km + 2$ $B$G$"$k(B. 

$z$ $BJ}8~%U%i%C%/%93J;RE@$KG[CV$5$l$?JQ?t(B, $B%9%+%i!<3J;RE@$KG[CV$5$l$?JQ?t(B
$B$KBP$7$F$bF1MM$KM?$($k$3$H$,$G$-$k(B. 


\subsection{$B$9$Y$j$J$7>r7o$NM?$(J}(B}

$B6-3&$GB.EY$r(B 0 $B$H$9$k(B. $B$3$N>l9g(B, $B6-3&$r$O$5$s$GJQ?t$NCM$,H?BP>N$K$J$k$h(B
$B$&$KM?$($k(B. 

$BNc$H$7$F(B $x$ $BJ}8~$K6-3&$rM?$($?>l9g$r9M$($k(B. $x$ $BJ}8~%U%i%C%/%93J;RE@$K(B
$BG[CV$5$l$?JQ?t$KBP$7$F$O(B.
%
\begin{eqnarray}
 &&u_{0(u),k} = u_{im(u),k} = 0 \\
 &&u_{-1(u),k} = - u_{1(u),k} \\ 
 &&u_{im+1(u),k} = - u_{im-1(u),k} \\ 
 &&u_{im+2(u),k} = - u_{im-2(u),k}
\end{eqnarray}
%
$B$H$9$k(B. $B6-3&>e$KG[CV$5$l$F$$$J$$JQ?t$KBP$7$F$O(B, 
%
\begin{eqnarray}
 &&\pi_{0,k} = - \pi_{1,k}  \\
 &&\pi_{-1,k} = - \pi_{1,k} \\ 
 &&\pi_{im+1,k} = - \pi_{im-1,k} \\ 
 &&\pi_{im+2,k} = - \pi_{im-2,k}
\end{eqnarray}
%
$B$H$9$k(B. 


\subsection{$B1~NO$J$7>r7o$NM?$(J}(B}

$B6-3&>e$GK!@~J}8~B.EY$r(B 0, $B@\@~J}8~B.EY$NK!@~J}8~HyJ,$r(B 0 $B$H$9$k(B. $B$3$N>l(B
$B9g(B, $B6-3&>e$GG[CV$5$l$?B.EY@.J,$O6-3&$r$O$5$s$GJQ?t$NCM$,H?BP>N$K$J$k$h$&(B
$B$KM?$((B, $B6-3&>e$KG[CV$5$l$F$$$J$$JQ?t$KBP$7$F$OJI$r$O$5$s$GJQ?t$NCM$,BP>N(B
$B$K$J$k$h$&$KM?$($k(B.

$BNc$H$7$F(B $x$ $BJ}8~$K6-3&$rM?$($?>l9g$r9M$($k(B. $x$ $BJ}8~%U%i%C%/%93J;RE@$K(B
$BG[CV$5$l$?JQ?t$KBP$7$F$O(B.
%
\begin{eqnarray}
 &&u_{0(u),k} = u_{im(u),k} = 0 \\
 &&u_{-1(u),k} = - u_{1(u),k} \\ 
 &&u_{im+1(u),k} = - u_{im-1(u),k} \\ 
 &&u_{im+2(u),k} = - u_{im-2(u),k}
\end{eqnarray}
%
$B$H$9$k(B. $B6-3&>e$KG[CV$5$l$F$$$J$$JQ?t$KBP$7$F$O(B, 
%
\begin{eqnarray}
 &&\pi_{0,k} =  \pi_{1,k}  \\
 &&\pi_{-1,k} =  \pi_{1,k} \\ 
 &&\pi_{im+1,k} =  \pi_{im-1,k} \\ 
 &&\pi_{im+2,k} =  \pi_{im-2,k}
\end{eqnarray}
%
$B$H$9$k(B. 
