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8.2.

,

, , . [115].

,

- (8.2.1), (8.2.3)

(8.2.4) (8.2.2)

, ,

, , (8.2.5)

, . , . , . , (5.4.2) , (5.4.1) .

, , , (8.1.14) (8.1.15), , (8.2.7) .

, (8.2.1) , , (8.2.8) sine-Gordon. (8.2.8), , (8.2.1). , , .

sine-Gordon

. 5.2 , sine-Gordon , (8.2.1) , , (8.2.7)

, sine-Gordon,

( )

. 8.3. (. ) sine-Gordon.

:

(8.2.9),

sine-Gordon. ([34], . 284).

(8.2.11), (8.2.8) ,

sine-Gordon, [98] (1953 .). , (8.2.8), , , sine-Gordon. .

, (8.2.11).

. 8.4. (. ) ( . 5.2).

- , , . 8.1, . . 8.1, . , . . 8.2 , sine-Gordon. . 8.3 .

, (8.2.8)

. , , (5.1.22). . 8.4. , , , . , . 5.2. , .

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