Hi to all!
I need to solve following equation:
\frac{\partial^2 u}{\partial t^2} + 2 \beta \frac{\partial u}{\partial t} -c^2\nabla^2u=0
It describes a damped wave on a x-y plane. 2\beta is damping factor and c is wave speed.
I haven't had any luck finding a PDE class that looks...