Re: [線代] eigenvector
※ 引述《mqazz1 (無法顯示)》之銘言:
: Every n*n matrix has n eigenvalues and n eigenvectors
: False
: ========
: (d) Each eigenvector of A is also an eigenvector of A^2
: True
2 2
Av = λv => A v = A(Av) = A(λv) = λ(Av) = λ v.
v: eigenvector.
: (e) Each eienvector of an invertible matrix A is also
: an eigenvector of A^(-1)
: True
Note that if A is invertible, then 0 is not an eigenvalue of A.
-1 -1 -1
Av = λv => v = A (Av) = A (λv) = λ(A v)
-1 -1
=> A v = λ v.
v : eigenvector, λ: eigenvalue.
: (f) If v is an eigenvector of an invertible matrix A,
: then cv is an eigenvector of A^(-1) for all nonzero scalars c
: True
-1 -1 -1 -1 -1 -1
Av = λv => A v = λ v => A (cv) = c(A v) = c(λ v) = λ (cv).
v : eigenvector, λ: eigenvalue.
: 請問這些是為什麼?
: 謝謝
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