作者查詢 / profyang
作者 profyang 在 PTT [ Math ] 看板的留言(推文), 共376則
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2F→:積分表答案:pi/b*arctan(b/a)04/02 02:08
4F→:沒有打錯04/02 02:09
5F→:要取Cauchy principal value04/02 02:09
7F→:這邊只是對實軸積分04/02 18:28
9F→:恩我想也是要用複變 難怪你上面講branch cut04/02 20:46
11F→:感謝04/02 22:08
14F→:恩看來我是卡在沒有計算虛軸的那兩條路徑04/02 22:57
17F→:簡單來說就是要避掉cut 這樣那個contour裡面才不會有04/02 23:42
18F→:singular point...我就覺得我一定有少考慮到一些04/02 23:43
19F→:奇異點= =+沒想到是cut造成的真是太久沒碰複變了T^T04/02 23:43
24F→:喔我的意思是cut line上的點就算是奇異點04/03 16:40
25F→:至少我之前學的時候是這樣定義的啦~04/03 16:40
2F推:沒有closed form阿~02/29 21:05
10F推:咦?∂是怎麼打出來的@@01/30 22:43
1F推:我前陣子也自己讀了一下Jackson 念到第八章就先暫停01/17 18:46
2F→:過陣子會再讀吧~此外6.8節的東西 我覺得藍道的書寫的01/17 18:47
3F→:比較清楚01/17 18:47
4F推:http://0rz.tw/uXEWO 之前寫的專題報告 你可以參考01/17 18:52
5F→:附錄A 我是參考Landau的寫法01/17 18:52
6F→:btw我也覺得讀Jackson很多驚喜!!例如6.6的東西我就01/17 18:53
7F→:覺得很有意思~以前推D向量H向量都只是在靜電靜磁狀況01/17 18:54
8F→:去推~但他這邊等於是直接從微觀的maxwell equation01/17 18:54
9F→:去推~很有意思!01/17 18:55
10F推:最後..我覺得目前我有自己去推的裡面最複雜的就是01/17 18:57
11F→:習題6.2 Heaviside-Feynman表示式...蠻複雜的因為還01/17 18:58
12F→:要考慮推遲效應...01/17 18:58
17F推:我主要是因為Landau用高斯制我懶得去習慣 所以就看01/18 10:31
18F→:Jackson然後Landau當參考~01/18 10:33
1F推:一般物理實驗的話要七個就夠了 社會科學方面就要更多12/29 23:53
3F推:兩個點決定一條直線 7點已經很少了...12/30 01:30
1F推:都可以11/02 00:38
1F推:1.我猜測應該是Ax=0的所有x代表了某subspace of R^n10/31 20:59
2F→:2.的話...寫直寫橫是有差嗎?= ="10/31 20:59
11F推:應該就是反正令F(x)等於零的點本來就不在定義域了10/30 21:33