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( )

- , V . , ( ), - 1 2,

- , :

, (15.3), , . ,

V,

,

, , :

( ). , :

(15.8) [ (15.5)]. (15.8) , :

(15.9),

(15.10)

(15.4).

, (15.6),

(15.11)

, , f. (15.11). (15.11) !

4- 1. , (15.11) (15.6).

. , , (15.11), (15.8) (15.9).

, , . . .

, , (. 13) . U h .

. 13.

, ,

(15.12)

(15,9):

(15.13)

(15.12) . , , . . .

, . . . , (15.13) . (15.13), (15.9) ( ), .

, (15.12) (15.13) , ,

[. . (15.9) ]. (15.9) , , .

(15.12), III IV ( ), . .

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