{"action":"closed","issue":{"url":"https://api.github.com/repos/Theano/Theano/issues/4447","repository_url":"https://api.github.com/repos/Theano/Theano","labels_url":"https://api.github.com/repos/Theano/Theano/issues/4447/labels{/name}","comments_url":"https://api.github.com/repos/Theano/Theano/issues/4447/comments","events_url":"https://api.github.com/repos/Theano/Theano/issues/4447/events","html_url":"https://github.com/Theano/Theano/issues/4447","id":152059009,"number":4447,"title":"Implement grad method and optimizations for FFT Ops","user":{"login":"lamblin","id":178249,"avatar_url":"https://avatars.githubusercontent.com/u/178249?v=3","gravatar_id":"","url":"https://api.github.com/users/lamblin","html_url":"https://github.com/lamblin","followers_url":"https://api.github.com/users/lamblin/followers","following_url":"https://api.github.com/users/lamblin/following{/other_user}","gists_url":"https://api.github.com/users/lamblin/gists{/gist_id}","starred_url":"https://api.github.com/users/lamblin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lamblin/subscriptions","organizations_url":"https://api.github.com/users/lamblin/orgs","repos_url":"https://api.github.com/users/lamblin/repos","events_url":"https://api.github.com/users/lamblin/events{/privacy}","received_events_url":"https://api.github.com/users/lamblin/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Theano/Theano/labels/CCW","name":"CCW","color":"f7c6c7"},{"url":"https://api.github.com/repos/Theano/Theano/labels/GPU%20-%20New%20back-end","name":"GPU - New back-end","color":"009800"},{"url":"https://api.github.com/repos/Theano/Theano/labels/Interface","name":"Interface","color":"0052cc"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2016-04-30T23:30:22Z","updated_at":"2016-06-21T19:37:25Z","closed_at":"2016-06-21T19:37:25Z","body":"The CPU FFT Ops (in `theano/sandbox/fourier.py` and `theano/tensor/fourier.py`) should be unified, and work like the Ops in `theano/sandbox/cuda/fftconv.py`, and the upcoming ones in the new back-end.\r\nThat is, to avoid problems with gradients through complex numbers, complex array would be represented as a real array of 1 additional dimension (of length 2).\r\nGradients should be implemented on the GPU Ops.\r\nAlso, optimizations from the CPU to the GPU versions should be added.\r\n"}}
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