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Math Help - harmonic

  1. #1
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    harmonic

    if u= 3x^2y then

    whether it is a harmonic function for all values of x and y.
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  2. #2
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    Re: harmonic

    The function will be harmonic if \displaystyle \begin{align*} \frac{\partial ^2 u}{\partial x^2}+\frac{\partial ^2 u}{\partial y^2} = 0 \end{align*}.
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