. , .
(, , , ) . . 1 (. 2.19) 2 . 4 1, 1, .
1 2. 2 3 2 3.
1 2. 2 3 2 3.
, , , 2 p1
v3 = v4 = 0. .
, 1 , l ( ). : 4 1 (l1 = p1v1), 1 2 () 2 3 (l3 = p2v2).
l1, l2 l3, , . , , , :
. (2.64)
. 2.19 1 2 3 4. 1 2. . , (1 2a . 2.20).
. (2.65)
! .
. 2.20 . 2.21
(2.64)
. (2.66)
, , (1 2).
p1v1 = p2v2; ,
. (2.67)
, , . 1 2. :
|
|
. (2.68)
, . 2.20, . (. 2.21).
. .