Definition:Wave Equation

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Equation

The wave equation is a second order PDE of the form:

$a^2 \left({\dfrac {\partial^2 w} {\partial x^2} + \dfrac {\partial^2 w} {\partial y^2} + \dfrac {\partial^2 w} {\partial z^2}}\right) = \dfrac{\partial^2 w} {\partial t^2}$


Also see


Sources