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4.9.

.

, (. ).

, ( ) , ,

m , (. 2.15), () .

,

(4.103)

,

(4.104)

, .

(4.104) . ,

, (4.104)

. 4.21.

. 4.22.

m ( ). (4.105) , , , , (, , ), .

() ( ) (), (, .). . 4.21 s,

() . , , , , , .

. 4.22. (. ).

A(t) (t), , .

A(t) (t) , . 4.22.

, . . [22].

, m . (. 2.15 3.11), . , , , . A(t) (t) .

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