u (t) v (t) : , , :
, (t) v(t) . , , Wu(ω) (t), , , .
. , . . . . . .
, , . . , s(t), ( ) x(t) , . s(t) s(t) x(t). "" x(t) s(t), , . , , ( ) ( ), , , ( ), ( ).
. (t) u(t-τ) () u(t), :
(5.1)
:Bu(τ)=Bu(-τ). (5.2)
: : (5.3) . = 0 .
, . (t) , .
. , : . (5.4)
, , . , : (5.5)
|
|
, : . (5.6)
. (5.1), (t) v (t) (5.7)
, , , τ: .
, . : ,
, (5.10)
.
, τ=0 .
. . , , , (t) v (t), -∞<ω<∞, : .