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(, , ).

(. 2.37, ), ( R-) (. 2.37, ) .

; :

(2.147), ( ) (

. 2.37.

. 2.38 ()

. , , (. . 4)

.

. 2.38, , (2.149) . (2.149) - (. 2.38, )

(2.150) . 2.38, . (2.147) () (. 2.39).

, , (. 2.40) , . ( )

. 2.39.

. 2.40.

(), -

, (2.147) (2.151), , . .

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