🚀 Feature

Multiple operations on complex numbers default to cpu (visible by aten:: in metrics report) or just do not work.
Specifically I have found:
defaulting to cpu:

• torch.real(x), x.real
• torch.imag(x) x.imag
• torch.conj(x)

not working:

• torch.abs(x) when x.requires_grad==True
  prints: abs does not support automatic differentiation for outputs with complex dtype

There are probably many more that I have not found and i am happy to add to this list if other people finde more.

This is my First Issue so feel free to tell me if any Information is missing, or additional steps I can take.