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I have a problem solving the following second order partial differential equation:

$\frac{\partial ^2p}{\partial x^2}=0$

Does anyone know how it can be solved?

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    $\begingroup$ In fact, there is nothing partial about it. $\endgroup$ – Ivan Neretin Sep 10 '15 at 12:31
  • $\begingroup$ Okay, but do you know how it can be solved? $\endgroup$ – David Sep 10 '15 at 12:33
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    $\begingroup$ Yes: the same way as an ordinary differential equation would. $\endgroup$ – Ivan Neretin Sep 10 '15 at 12:33
  • $\begingroup$ $p$ is a function of what variables ? $\endgroup$ – Svetoslav Sep 10 '15 at 12:42
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    $\begingroup$ Just integrate twice w.r.t. $x$, but keep in mind that the constant of integration that you would get in an ODE is now a constant function w.r.t. $x$. $\endgroup$ – Nigel Overmars Sep 10 '15 at 12:52

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