(, , ) , , .
. , , , - () () .
. , .
l(t). (t) , t.
1 , . , .. . . . .
l(t) = const t
(t)= (-l t). (1.1)
n , .. l, l
l = n l, (1.2)
t
(t)= (- n l t). (1.3)
N
P (t)= , (1.4)
i i - .
,
l= , (1.5)
|
|
n i - i - ; li - i - ; N () .
l
(t) = (-l t). (1.6)
.. =1/l. (1.7)
, , (1.3), (1.4) (1.5), t (1.6).