There's a merge conflict - the config needs to be updated.

Is this still needed @dhpitt @vduruiss ?

The fdm part is outdated now so not necessary, but the autograd part could add a simple example to the library.

I don't think that would require too much time, but would be useful because at the moment we only have the Poisson example for autograd which can be hard to follow

It would need to be cleaned up a little bit and then tested

I think it's worth adding still as it's a nice simple demo. Will update soon

@dhpitt Any update on this, or should we close?