# Solving a second order partial differential equation

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?

• In fact, there is nothing partial about it. – Ivan Neretin Sep 10 '15 at 12:31
• Okay, but do you know how it can be solved? – David Sep 10 '15 at 12:33
• Yes: the same way as an ordinary differential equation would. – Ivan Neretin Sep 10 '15 at 12:33
• $p$ is a function of what variables ? – Svetoslav Sep 10 '15 at 12:42
• 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. $x$. – Nigel Overmars Sep 10 '15 at 12:52