[線代] 線代(6)
Let F_9 be a finite field of nine elements. Can you find a
3╳3 matrix with entries in F_9 that one of its eigenvalues
is in an extension field of F_9 rather than in F_9 itself?
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，你有摳摳ㄋㄟ
可憐可憐我吧，施捨一點吧
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