> > . 1
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2.8.

2.8.1. -

. -

() - [. 2.5.4, )].

. ,

.

:

3) :

4) ...

X [. II, 5.4],

, - [. II, 11.4.11];

5) X X" ,

( ) [. 5.3.1]. [Graybill (1976), . 4]. - [Harter and Owen (1970), . 1-G].

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