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(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

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o ¨ ¢ ¡ £¢¥¤§¦©¨<br />

¡ § ¨<br />

<br />

F = {(a, a2 ) | a ∈ IR} ¢¢¡ IR 2 <br />

<br />

G = A ∈ Mn×n(IR) | A + AT ¢ <br />

= αIn α<br />

¡ <br />

∈ IR<br />

<br />

¡ ¨ IR 4 <br />

<br />

Mn×n(IR)<br />

F = {(a, b, c, d) ∈ IR 4 | d = a + b + c}<br />

G = (1, 1, 0, 0), (1, 0, 1, 1), (1, 2, −1, 1) <br />

¡ F 4<br />

IR<br />

F<br />

<br />

G<br />

dim F ∩ G dim(F + G)<br />

¤ <br />

<br />

<br />

¡ ¢<br />

¡ ¨ A =<br />

179<br />

<br />

<br />

<br />

2 −1 1<br />

<br />

4 −3 1<br />

4 −3 1<br />

A<br />

A<br />

<br />

<br />

<br />

A ¡ ¢ ¨ <br />

P <br />

<br />

¤ <br />

P −1 <br />

2<br />

AP =<br />

0 0<br />

<br />

¨¥ ¨ § <br />

0 0 0<br />

0 0 −2<br />

a = 0 b = 0 α = 0 α = 1 <br />

<br />

a 2 + b 2 = (a + b) 2 αa 2 = (αa) 2<br />

<br />

(a, a 2 ) + (b, b 2 ) = (a + b, a 2 + b 2 ) = (a + b, (a + b) 2 ),

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