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作者 Vulpix 在 PTT [ Physics ] 看板的留言(推文), 共1703則
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1F→:縮減沒錯10/21 23:57
37F→:辛流形的一個常見的模型是T*M, 其中M的coor.部份相當於x10/16 22:04
38F→:而T*_{x}M這些vector就相當於動量p了10/16 22:04
1F→:嗯,對啊。如果F是超距力還比較好想像,可是如果F是接觸力10/14 00:57
2F→:通常會覺得很奇怪... 不過,這個問題應該是有忽略碰觸時的10/14 00:58
3F→:各種效應(可能時間太短之類),所以本質跟超距力的情況10/14 00:59
4F→:是一樣的。10/14 00:59
5F→:另外,你兩個問號問的都是同一問吧……10/14 01:00
3F→:但是公式這樣寫會讓人對極限產生誤解...10/12 18:11
9F→:1,3,7這個跟division algebra有關?10/07 19:20
5F→:εij跟Ej有關的話不就不是tensor了?10/01 01:44
17F推:話說那個「垂直」位移是垂直於哪個方向的位移?04/16 23:56
8F→:也可以排斥啊...04/16 12:13
1F→:還是會,但是車頭車尾不同時掉進去04/15 09:49
5F→:3D動畫?03/22 21:45