作者查詢 / alan23273850
作者 alan23273850 在 PTT [ Math ] 看板的留言(推文), 共1317則
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12F推: 當然是 1,語意蠻明確的03/22 11:05
1F→: 我好像解出來了,答案是肯定的!我把原 obj 用連鎖01/17 01:14
2F→: 率以 r 為中間變數對 B 作微分之後,運用反函數的01/17 01:14
3F→: 微分公式消去一些項之後,剩下 -log2(f^-1(B)),又01/17 01:14
4F→: 根據 f 的函數圖形,B 固定的時候 d 遞增則 f^-1(B01/17 01:14
5F→: ) 遞減則 -log2(f^-1(B)) 遞增,此現象對每個 B 都01/17 01:14
6F→: 如此,因此 obj 從原點出發的時候就永遠是大的 d01/17 01:14
7F→: 贏了!01/17 01:14
8F→: 事實上 B 還必須 > 0 才行01/17 01:27
9F→: 如果還要更細緻的討論的話,就是這個函數在 B=0 和01/17 02:15
10F→: B>0 之間也許沒有連續,所以如果只依賴 B->0 時的01/17 02:15
11F→: 函數值 -> 0 for all d 的話,要怎麼 claim 大 d01/17 02:15
12F→: 的函數值較大還是個問題...01/17 02:15
14F→: 老師開口閉口都是 cover & thomas,還有另外幾本比01/17 10:55
15F→: 較次要的01/17 10:55
17F→: 那是 information theory 的課本不是 optimisation01/17 12:23
18F→: 專書01/17 12:23
20F→: 最後終於把整個問題全劇終,從原點極限搭配向右出01/18 17:59
21F→: 發的大小關係便可以 implies 函數永久的大小關係,01/18 17:59
22F→: OBJ 跟老師從作業結論 reduce 過來的解一模一樣,01/18 17:59
23F→: 老師真的猴腮雷!這小題的檢討我寫了四面答案卷,01/18 17:59
24F→: 希望其他題不會讓我這麼崩潰01/18 17:59
25F→: * 20F:向右出發的「斜率」大小關係01/18 18:00
26F→: 然後 B = 0 有唯一解 001/18 20:01
6F推: 第一次看到這種變數變換法,竟然是對的!12/03 15:20
8F→: 至少我沒看過包含+號的,但應該沒錯12/03 19:56
4F推: Matlab?08/19 17:38
3F→: 對對對!我要的就是樓上的那兩條,請問有書籍可以07/09 09:13
4F→: 參考嗎?07/09 09:13
5F→: 歐對補充一下,其實我的離散數學課本也有證明,但07/09 09:24
6F→: 他是從 exact 推到 at least, 我想反過來從 at lea07/09 09:24
7F→: st 推到 exact (因為就是兩個 at least 相減而已)07/09 09:24
8F→: ,目前則是卡在那兩項要怎麼用組合學觀點快速推出07/09 09:24
9F→: 回一樓,我想知道藍色字的部份是怎麽推出來的07/09 11:23
10F→: 我找到二樓的課本了!Applied Combinatorics By Tuc07/09 15:43
12F→: 白話來說我想知道我寫的等式推廣到一般化為何是對07/10 00:03
13F→: 的,然後推文的課本其實只有證 exact 沒有證 at le07/10 00:04
14F→: ast07/10 00:04
15F→: 有人站內信我代數證法了,現在還是很好奇組合證法XD07/10 11:01
17F→: 圖1 https://i.imgur.com/73gyaHG.png07/10 12:50
18F→: 圖2 https://i.imgur.com/C90Idg6.png07/10 12:50
5F推: 請問是從哪邊轉錄的呢?07/09 00:52
5F推: 哪裡查到的05/15 10:40
3F推: 不就是 A*A 的特徵值再開根號嗎05/04 20:26
2F推: Vq \in N s.t. l{i \in N l i < Vq}l = q-1 呢05/02 00:54
9F推: C++表示:ordered set05/02 10:35
9F推: 問問題而已幹嘛不舒服04/19 12:21