作者查詢 / math1209
作者 math1209 在 PTT 全部看板的留言(推文), 共634則
限定看板:全部
看板排序:
7F→:Little Oh 只是計算性的工具. 梯度不是從這邊出來.04/27 11:47
8F→:而是作微分定義時, 用 小 o 寫比較簡便.04/27 11:48
1F推:<P_n,P_m> = 0 for n≠m by the construction or04/27 11:46
2F→:we can prove it by using integration by parts.04/27 11:46
633F推:請問現在是幾比幾? 幾局了?04/25 04:04
5F推:這三個作者那本有阿~(線代)04/22 01:46
16F推:Let t = csc x + cot x, then we have04/15 00:49
17F→:(1) dt/t = csc x dx. (2) (t + 1/t)/2 = csc x.04/15 00:50
18F→:Using above, we can calculate S (csc x)^n dx for04/15 00:51
19F→:any positive integer n, and similarly for secx.04/15 00:51
20F→:(1) is wrong, and (1) should be dt/t = - csc x dx04/15 00:52
21F→:For example, S (csc x)^2 dx = S csc x (csc x) dx04/15 00:54
22F→: = -1/2 S 1 + t^(-2) dt = ... .04/15 00:54
24F推:Since det(M^t) = det(M) holds trivially,04/15 00:38
25F→:det((AB)^t) = det (B^t A^t) = det(B^t)det(A^t)04/15 00:39
26F→:= det B det A.04/15 00:39
2F推:不是不常見, 根本到處都是...只是偽裝的140.113.25.169 04/15 01:02
3F→:很好...140.113.25.169 04/15 01:02
4F推:Ans: 1 by using Stoltz theorem.04/14 04:02
32F推:??? 看不懂推文 =.= 不是死了嗎?04/15 00:58
33F→:今日,長空以破甲貫穿了李練的頭…… = = .04/15 00:58
8F推:微分是局部性的行為: 考慮 -5 附近的點時, 我們的04/14 11:39
9F→:f(x) = -(x+1) - (x-5) + (4x -3) => f'(-5) = 2.04/14 11:40