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作者 Vulpix 在 PTT 全部看板的留言(推文), 共57292則
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1F→:你再算一次,高中方法可以算出來正確解答02/22 00:13
2F→:最後一個問題:無所謂,那是習慣問題02/19 23:26
3F→:因為k是zero,k^2=k,這題的答案是 k+m=0, k,m非零02/19 23:26
2F→:祝金榜題名!02/18 23:40
55F推:R.I.P.02/18 23:49
1F→:用坐標解一定可以的02/17 22:32
2F→:共平面才奇怪吧,你應該高興...02/15 19:13
2F→:實矩陣的min.poly.應該是實係數吧02/14 23:37
3F→:另外,這問題用Jordan form做出來是"true"02/14 23:37
1F→:λ的eigenspace不見得只有一維...02/09 22:23
4F→:我已經把這些假設腦補了 但不是這個問題啊02/09 22:30
5F→:你試試看 S=I,T隨便 然後跑一遍你的證明02/09 22:31
6F→:問題是出在你選的x不一定剛剛好是λ的eigenspace中02/09 22:32
7F→:也是T的eigenvector的那一個02/09 22:32
13F→:等等,"T(x)也在λ的eigenspace裡"真的代表Tx和x只差02/09 22:50
15F→:某個常數a倍嗎?一樣用S=I的例子來檢視看看:02/09 22:51
16F→:T隨便選,x只要不是0都在S關於λ=1的eigenspace裡02/09 22:52
17F→:那還能保證Tx一定跟x同方向嗎?02/09 22:53
20F→:p=2很簡單,p不是2的話可以用Wilson定理02/09 23:03
22F→:hint:(p-1)!-(p-1)是p的倍數也是(p-1)/2的倍數02/10 02:19