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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7170則
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1F→:1.微分有誤(雖不影響最後答案) 2.最後答案不對07/31 20:30
2F→:應該說,最後三行不要寫……07/31 20:30
2F→:大概猜得到你想說的事…… 如果是bdd domain的話07/30 00:54
3F→:Sturm-Liouville Thm.告訴我們特徵值一定是正的07/30 00:57
5F→:抱歉,你是對的。重新說我想說的:跟S-L Thm.沒關係,07/30 02:07
6F→:問題在bdd domain的時候,space part通常不能有x這類07/30 02:09
7F→:的東西,而且邊界條件也會把另外的常數消掉07/30 02:09
8F→:導致ω^2=0根本不是特徵值07/30 02:10
4F推:應該要加上E、F分別在線段CH、線段CG上07/25 19:35
3F→:嗯,(3.)雖然不是橢圓盤,但是是閉集07/25 01:47
2F→:真的那麼擔心的話就用瑕積分的標準處理程序就好啦07/24 19:09
1F→:二階差分是0的應該是deg=1或deg=0或007/24 16:56
2F→:而且f"=const.表示deg(f)=207/24 16:57
1F→:可以,但這樣不見得是最方便的定義07/21 01:48
2F→:況且,自乘三次等於-1的東西還有兩個……07/21 01:58
7F→:你手頭上的已經是我覺得最精彩的科普了07/20 11:57