Aη1 = 0, Aη2 = 0, Aη3 = 0, ä¸ Î·1ï¼Î·2ï¼Î·3 线æ§æ å
³ã
å A(η1+η2+η3) = 0, A(η1+η2) = 0, A(η2+η3) = 0,
η1+η2+η3, η1+η2, η2+η3 æ¯ Ax = 0 ç 3 个ä¸å解ï¼
(η1+η2+η3, η1+η2, η2+η3) = (η1ï¼Î·2ï¼Î·3)P, å
¶ä¸ P =
[1 1 0]
[1 1 1]
[1 0 1]
åçè¡åæ¢ä¸º
[1 1 0]
[0 0 1]
[0 -1 1]
åçè¡åæ¢ä¸º
[1 1 0]
[0 1 -1]
[0 0 1]
P 满秩ï¼å η1+η2+η3, η1+η2, η2+η3 线æ§æ å
³ï¼
å³ Î·1+η2+η3, η1+η2, η2+η3 æ¯ Ax = 0 çåºç¡è§£ç³»ã
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