Fourier transform for bosons is not implemented

[krivenko]

Comments in triqs/gf_local/fourier.cpp say that 'Boson not implemented'. Is there a technical reason which makes the implementation considerably harder than for fermions?
I can try to write the code (probably I'm among not so many people who really need it) and would appreciate suggestions/cautions concerning it.

[parcollet]

The only reason is that we did not use it yet (I used it a lot in the past, before TRIQS ...).
How to do it ? It should be "almost" done, the assert is there because it has not been tested, I think.
I will check and get back to you, or @mferrero will...

[mferrero]

@krivenko : Leonid needed that Fourier transform and he implemented and tested it. It is in the main repository now. But it would be very useful if you could test it as well. Let us know! It is commit 07b2bfb.

[krivenko]

@mferrero : I will test it soon in the context of my slave rotors code and close the issue if it works.

[mferrero]

I found a small mistake in the Fourier. I fixed it in commit 476c192. Some tests should be added to test all these Fourier transforms.

[mferrero]

@krivenko : Did you have a chance to try the bosonic Fourier transforms? I did a couple of easy tests and it looked like it was working.

[krivenko]

@mferrero Sorry, didn't try yet. But if you are sure it's functional feel free to close the ticket.