推 kittor : nonconservative 07/10 21:29
→ suhorng : 是吧? grad (x e^{-y})? 07/10 22:55
→ fong1014 : conservative. x e^{-y}(2,0)-(0,1)=2 07/11 01:12
→ kittor : 呃，x方向分量想著微y，卻想成微x的結果@@，y方向分 07/11 09:41
→ kittor : 量倒是沒微錯@@ 07/11 09:41