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http://th.wikipedia.org/wiki/%E0%B9%81%E0%B8%84%E0%B8%A5%E0%B8%84%E0%B8%B9%E0%B8%A5%E0%B8%B1%E0%B8%AA%E0%B9%80%E0%B8%A7%E0%B8%81%E0%B9%80%E0%B8%95%E0%B8%AD%E0%B8%A3%E0%B9%8C

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ᢹ˹觢ͧԵʵ Ҵ¡¹ŧͧͧǡԵ٧ҡѺͧԵ һСͺ෤Ԥ㹡ѭ ٵäӹdzǢͧҧ ջªҹҡ㹷ҧǡ ԡ

ʹǡ ¶֧ кؤǡѺء ش㹻ԷԨó ǡѺ ʹ 繡кؤѺء ش㹻 سԢͧ ʹ 繡кؤس 繻ҳѺе˹ ǹŢͧйʹǡ ͧҡŢͧӷШش鹨ж١кش ǡ

ǴԹ÷ӤѭŤǡ:

  • ¹ (gradient) ѭѡɳ \,\operatorname{grad}~\varphi\, \,\nabla\varphi\,: 繵ǴԹѴѵ ȷҧ ¹ŧͧʹ ѧ¹ͧʹ ʹǡ
  • (divergence) ѭѡɳ \,\operatorname{div}~\vec F\, \,\nabla \cdot \vec F\,: 繵ǴԹѴ ͡(繨شԴʹ)ͧ ʹǡ ش
  • (curl) ѭѡɳ \,\operatorname{curl}~\vec F\, \,\nabla\times\vec F\,: 繵ǴԹѴдѺعǹ ش Ţͧʹǡ աʹǡ˹

ǴԹա˹觤 ǴԹһҫ ҡûء ਹ ¹ ѹ

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