推 a81288653:考試要寫這樣就沒錯!! 09/09 16:45
※ 引述《lai90043 (賴伯)》之銘言:
: 1.Let u be a unit vector in R^n and A = I - 2uu^T
: -1
: determine A .
我想這個A是householder
2 T T
A = (I-2uu )(I-2uu )
T T T
= I - 4uu + 4uu uu //題目說u是unit vector
T T
= I - 4uu + 4uu
= I
-1
得 A = A
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