title: Gaussian pulse in density for 3D linearized Euler equations

This setup illustrates the simulation of gauss pulse in density with
3D linear Euler equation.

The configuration is provided in `ateles.lua`:

```lua
{!examples/lineareuler/3D/gauss_pulse/ateles.lua!}
```

1. Projection: fpt

2. Polynomial representation: Q

3. Filtering: -

4. Timestepping: explicitRungeKutta, 4 steps

5. Boundary conditions: primitives
