Niklas Koep

Thanks for the quick feedback, guys! Re your points, @NicolasBoumal: - Our test is directly based on manopt's `checkhessian` function. AFAICT the only difference to the procedure described in Section...

> Hi everyone, thanks for all the help! > > I do suspect the Hessian of product manifold and special orthogonal group is problematic. I doubt there is an issue...

> I updated the PR and it passes all the tests now ! For me it is ready to be merged. What do you think @nkoep ? Hi @antoinecollas! Thanks...

I'm closing this again for now due to the missing jvp support of `autograd.numpy.linalg`.

Closing this in favor of #232.