i, j k:
, , .
=i +ayj +azk b =bxi +byj +bzk. , ( ):
ó
:
(7.1) . (7.2) .
25. .
, b , : (b). , . , , . .
(b)*. , , b, d =b(. . 22).
: ( b) = d = |d| d, |d|=| b| =S, S , b, d = d = - , ͗ . : (axb)*c =S *(H), . . (axb)*c =V, V , , b .
, , , , , , .
1. , . . (b)=(b)=()b.
, , .
2. , . . (b)=*(bx).
, (b)=V (b )=(b)=V. , , b, b, , .
, (ab)=a (b). ( b) abc , .
3. -, . . abc =-acb, abc =-bac, abc =-cba.
, , .
4. , b , .
abc =0, , b .
, . V¹ 0. abc =V, , abc¹0. : abc =0.
, , b, . d =b , , b,, , d^. d =0, . . abc =0.