[理工][線代]對角化的問題
True and False
Two diagonalizable matrices A and B with the same eigenvalues and
eigenvectors must be the same.
我一開始的想法是要是A跟B矩陣的eigenvalue及其對應的eigenvector相同
也就是A*x_i=λ_i*x_i, B*x_i=λ_i*x_i for every i,
then there exist P invertable s.t P^-1*A*P = D = P^-1*B*P => A = B 得證
但是不知道有沒有可能出現一種情況是在A矩陣裡, λ_1對應的eigenvector是x_2,
而B矩陣中λ_1對應的eigenvector是x_1, 也就是
A*x_2=λ_1*x_2, B*x_1=λ_1*x_1, 這樣的話上面的證法就不對了...
PS.這題答案原始是給true
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