, , S2,..., Sn-1 .
|
= -l12P1(t) + l21P2(t)
= li-1,iPi-1(t)+li+1,iPi+1(t)(li,i-1+li,i+1)Pi(t), i=2,n-1 (25)
.....
= ln-1,nPn-1(t) - ln,n-1Pn(t)
= 0. (26)
|
, . :
= -l12P1(t) + ln1Pn(t)
.....
= li-1,iPi-1(t) - li,i+1Pi(t), i=2,n-1 (27)
.....
= ln-1,nPn(t) ln1Pn(t)
:
(28)
P2= P1, P3= P2= P1 Þ Pi= P1, Pn= P1 (29)
P1=[1+l12( + +...+ )]-1( ) (30)
ti=1/li,i+1 i-
Pi= ti / . (31)
, , , .
.
|
, ( );
;
.
, l1 . l2.
. n+3 .
S-1 , , ();
S0 , ;
Si i , ;
Sn , ;
Sn+1 , , .
|
r = , :
|
|
P-1 = Pi = ri+1P-1, i = 1,n+1. (32)
: , , ..
Pn+1= P1= (33)
,
. . 2 :
( );
.