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[Sponsors] |
October 17, 2007, 03:20 |
a vetor deduction
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#1 |
Guest
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c is a sclar F(c)={|\nabla C|^q}/q
I want to know d(F(c))/dc thx a lot |
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October 18, 2007, 04:52 |
Re: a vetor deduction
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#2 |
Guest
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anyone can help me?
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October 18, 2007, 07:38 |
Re: a vetor deduction
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#3 |
Guest
Posts: n/a
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if you mean C = c in your functional, answer is zero
to clarify consider 1D case where \nabla c = c_x, therefore F = F(c_x) (not F(c) !) dF/dc = (dF/dc_x)(dc_x/dc), dc_x/dc = d/dc(dc/dx)= d/dx(dc/dc)=d/dx(1)=0 hope this help. |
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