二梯度的外積的散度為零之證明

Posted on 08/24/2015 by ccjou

網友林聖興：

老師您好，看見有人對於“梯度、散度與旋度”第14條公式有疑問 (註：\hbox{div}(\nabla f\times \nabla g)=0)，我一時好奇，試著推演看看，答案是 0，沒錯！

以MathType打字，附檔裡面有彩色，我不大會用LaTeX的方式操作網頁回覆，寄給您參考。

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