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det(P −1 AP ) = det P −1 det A det P<br />
= (det A)(det P )(det P ) −1<br />
= det A<br />
α : V → V det α = det[α]B <br />
B V <br />
det : End(V ) → F <br />
det ι = 1<br />
det α ◦ β = det α det β<br />
det α = 0 α α det α −1 =<br />
(det α) −1 <br />
GL(V ) V GLn(F) <br />
n × n F GL(V ) GLn(F) det : GLn(F) → F <br />
<br />
A ∈ Mm(F) B ∈ Mk(F) C ∈ Mm,k(F) det <br />
A C<br />
0 B =<br />
det A det B<br />
B, C dB,C : A ↦→ det <br />
A C<br />
0 B <br />
Fm dB,C(A) = det A det <br />
I C<br />
0 B C <br />
B ↦→ det <br />
I C<br />
0 B Fk det I C<br />
0 B = det B I C<br />
0 I <br />
det <br />
I C<br />
0 I = 1 I C<br />
0 I det A C<br />
0 B = det A det B<br />
X = <br />
A C<br />
0 B <br />
<br />
A C<br />
det =<br />
0 B<br />
m+n <br />
ε(σ) xσ(j)j σ∈§m+n j=1<br />
x σ(j)j = 0 j ≤ m σ(j) > m σ <br />
j ∈ [1, m] σ(j) ∈ [1, m] x σ(j)j = a σ1(j)j σ1 ∈ Sm <br />
σ [1, m]<br />
j ∈ [m + 1, m + k] σ(j) ∈ [m + 1, m + k] l = j − m <br />
x σ(j)j = b σ2(l)l σ2(l) = σ(m + l) − m<br />
ε(σ) = ε(σ1)ε(σ2) σ <br />
det ⎛<br />
<br />
A C<br />
0 B = ⎝ <br />
⎞ ⎛<br />
m<br />
ε(σ1) a ⎠ ⎝<br />
σ1(j)j<br />
<br />
⎞<br />
k<br />
ε(σ2) a ⎠<br />
σ2(j)j<br />
σ1∈Sm<br />
= det A det B<br />
j=1<br />
σ2∈Sk<br />
A = (aij) n × n A ij (n − 1) × (n − 1)<br />
A i j<br />
l=1