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作者 plover 在 PTT [ Math ] 看板的留言(推文), 共104則
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[其他] 推薦這本書:「數學 - 確定性的失落」
[ Math ]22 留言, 推噓總分: +8
作者: plover - 發表於 2011/10/20 00:19(14年前)
3Fplover:我有寫一篇偏激的讀書心得,導讀的話..10/20 11:25
4Fplover:"序"就是不錯的導讀10/20 11:26
Re: [高微] marsden 1-3 習題
[ Math ]7 留言, 推噓總分: +5
作者: craig100 - 發表於 2011/10/19 23:26(14年前)
1Fplover:看不懂 all but finitely many?10/19 23:31
4Fplover:對~那也來算一下 inf S 吧10/19 23:59
[微積] 連續性
[ Math ]1 留言, 推噓總分: +1
作者: suzzdicon - 發表於 2011/10/19 02:53(14年前)
1Fplover:f is not well-defined. m & n are relative prime?10/19 14:33
Re: [分析] Cardinality、Compact
[ Math ]36 留言, 推噓總分: +4
作者: jacky7987 - 發表於 2011/10/18 23:35(14年前)
2Fplover:(1) 如何證明 |Y^X|=|Y|^|X| ?10/19 00:07
7Fplover:CH + AC => 2^{N_0}=c10/19 00:21
14Fplover:那為什麼 c^c = 2^c? 看起來應該是 c^c > 2^c10/19 14:18
15Fplover:接下來就得證明: c^c > 2^c 以及 2^c >, 然後10/19 14:40
16Fplover:再說明 c_1 > c_2 & c_2 > c_3 => c_1 > c_3 ...10/19 14:40
[微積] 極限一題
[ Math ]3 留言, 推噓總分: +3
作者: ian60702 - 發表於 2011/10/18 23:01(14年前)
2Fplover:ε-δ10/18 23:22
3Fplover:如果不會用ε-δ,那就參考樓上提示.10/18 23:25
[線代] 矩陣問題
[ Math ]6 留言, 推噓總分: +3
作者: lxy351 - 發表於 2011/10/18 00:56(14年前)
2Fplover:(1 1), F = any field with char(F) = 210/18 02:11
3Fplover:(0 0)10/18 02:11
4Fplover:好吧我無聊了,如果char = 0, 如cuttlefish大師所言10/18 02:12
[中學] 多項式
[ Math ]9 留言, 推噓總分: +4
作者: me5119 - 發表於 2011/10/17 16:27(14年前)
1Fplover:不告訴你10/17 16:40
[機統] r1<=r2 成立的機率, r1和r2為random numb
[ Math ]12 留言, 推噓總分: +3
作者: becherovka - 發表於 2011/10/17 11:36(14年前)
1Fplover:用簡單的方式說, 考慮 x-y座標系統 x,y 落在0,1之間10/17 14:11
2Fplover:畫一條斜線x=y, 會把正方形區域割成兩部分10/17 14:12
3Fplover:左上部分就是 x < y。你可以想像 x < y 的機率10/17 14:13
4Fplover:= 左上部分面積 / 正方形面積 = 1/210/17 14:13
7Fplover:很難,就跟樂透彩一樣,那些彩球真的是random嗎 XD10/17 16:43
[幾何] 曲面論
[ Math ]15 留言, 推噓總分: +2
作者: hanabiz - 發表於 2011/10/16 22:24(14年前)
13Fplover:幾何直覺上就如thisday大師所言10/17 14:09
14Fplover:至於嚴格論證..follow Vulpix10/17 14:10
[分析] 如何證明[1, +無限大)是閉集呢?
[ Math ]9 留言, 推噓總分: +4
作者: playmypig - 發表於 2011/10/06 22:17(14年前)
3Fplover:證明 (-inf,1) is open 就可以了10/06 22:36