※ 引述《shmily000 (愛雪兒)》之銘言：
:                         2
:    Suppose that matrix A  is diagonalizable , prove that matrix A is
:    also diagonalizable .
如果A是任何矩陣的話, 該命題不一定成立
        [0 0]         [0 0]
Ex: A = [1 0]  , A^2 =[0 0]

A^2 is diagonalizable but A is not.(雖然這例子有點鳥..)


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