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(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

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¢¡¤£¦¥ ¡ §¡<br />

¢ ¤ ¤ ¥ © £¢ © <br />

¡ ¤ A£¢ 1<br />

¡ ¤ −1<br />

α A α<br />

¡ ¢ ¦ ¥¤ −1 <br />

A<br />

¡ ¢ ¦<br />

, A<br />

¡ ¨ § A ∈ Mn×n(IR) <br />

¨<br />

<br />

¨¥ ¨ A ∈ Mn×n(IR) £¢ ¤ ¨<br />

¢ α ¤<br />

X = 0<br />

1<br />

α<br />

AX = αX<br />

⇐⇒<br />

⇐⇒<br />

¤ ¡<br />

X = 0<br />

<br />

¢<br />

A £¢ α = 0 ¥¤ X ∈ Mn×1(IR)<br />

A −1 (AX) = A −1 (αX)<br />

X = 0<br />

X = αA −1 X<br />

⇐⇒<br />

⇐⇒<br />

X = 0<br />

In X = αA −1 X<br />

X = 0<br />

A −1 X = 1<br />

α X<br />

A−1 <br />

¡ ¨ ¢ ¨ £¢ ¥¤ ¨ A P ∈<br />

¨ ¢ Mn×n(IR) Mn×n(IR) <br />

D ∈<br />

P −1AP = D ⇐⇒ (P −1AP ) −1 = D−1 ⇐⇒ (AP ) −1 (P −1 ) −1 = D −1<br />

⇐⇒ P −1 A −1 P = D −1<br />

¡

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