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α : A
n
→ A
n
A
n
A
n
α : A
n
→ A
n
M ∈ A
n
α(M) ∈ A
n
{O; e
i
}
{O; e
i
} α
α
y
j
= α
j
i
x
i
+ b
j
, det (α
j
i
) 6= 0.
GA(A
n
) A
n
α :
A
n
→ A
n
M {x
i
}
{O; e
i
} M
0
{x
i
} {O
0
; e
0
i
} O
0
= α(O) e
0
i
= bα(e
i
) = α
j
i
e
j
O
e
1
e
2
O
0
e
0
2
e
0
1
α A
n
M
0
, M
1
, . . . , M
n
M
0
0
, M
0
1
, . . . , M
0
n
M
0
, M
1
, . . . , M
n
M
0
0
, M
0
1
, . . . , M
0
n
M
p
M
0
p
p = 0, 1, . . . , n
α {M
0
;
−−−→
M
0
M
i
} {M
0
0
;
−−−→
M
0
0
M
0
i
}
VWXYZY[Y\]Y^ Ølgdgf`ald α : A → A j``abbgxg efghifjbhikj A
bjlckjmiht j``abbcd efmg|fjlgkjbamd efghifjbhikj An
n n n
0,,A* .3*-+35E-B5,08 ,5EAB57 751* 50,,A:0 DB0*,08:0
060 .3-/7- DB0*,08:0 */60 ,* B-E,015*7 DB2/:A/6*,,-/70 50,,A*
DB0*,08 :-,- 35//:5730B57> 0 B *B160D-BAC .3-/735,/7B5C<
30 35//:-73*,00 50,,-9- DB0*,08 α : An → An */7*/7B*,,- 35/
/:5730B57> 1--3D0,57A 7-)*1 M ∈ An 0 0C -+35E-B α(M ) ∈ An -7,-/0
7*6>,- -D,-9- 0 7-9- * 3*.*35 {O; ei} < E I /6*D2*7 )7- B 1--3D0,575C
-.3*D*68*:AC 50,,A: 3*.*3-: {O; ei} 50,,-* DB0*,0* α E5D5*7/8
235B,*,08:0 α ~
y j = αij xi + bj , det (αij ) 6= 0. »
@,-*/7B- GA(A ) B/*C 50,,AC .3*-+35E-B5,0 .3-/735,/7B5 A
-+35E2*7 932..2 -7,-/07*6>,- 1-:.-E0½00 .3*-+35E-B5,0 <
n n
ªY«\]Y^ /--7B*7/7B00 / 35//:-73*,,A: 35,** /62)5*: 0E-:-30E
:5 50,,AC .3-/735,/7B -D,- 35E:*3,-/70 50,,-* DB0*,0* α :
)
An → An .*3*B-D07 7- 12 M 0:*2 1--3D0,57A {xi } -7,-/07*6>,-
,*1-7-3-9- 3*.*35 {O; ei} B 7-)12 M 0 0:*2 7510* * 1--3D0,57A
{xi } -7,-/07*6>,- 3*.*35 {O0 ; e0i } 9D* O0 = α(O) 5 e0i = α
b(ei ) = αij ej <
e2
O0
O e1
e01 e02
ªZ« Ù^ -15E57> )7- 50,,-* DB0*,0* α .3-/735,/7B5 A .*3*B-
D07 B/810 ,5+-3 7-)*1 M0, M1, . . . , Mn ,5C-D80C/8 B -+*: .-6-*,00
n
B ,5+-3 7-)*1 M00 , M10 , . . . , Mn0 751* ,5C-D80C/8 B -+*: .-6-*,00 0
D68 6+AC DB2C ,5+-3-B M0, M1, . . . , Mn 0 M00 , M10 , . . . , Mn0 7-)*1 ,5C-D8
0C/8 B -+*: .-6-*,00 /2*/7B2*7 *D0,/7B*,,-* 50,,-* DB0*,0*
.*3*B-D8** 7-)12 Mp B 7-)12 Mp0 D68 B/*C p = 0, 1, . . . , n <
ÈYÉY\]Y^ B0*,0* α .*3*B-D07 3*.*3 {M ; − −−→ B 3*.*3
{M00 ; M00 Mi0 } <
−−−→
0 M0 Mi }
¼
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