# Julian implementation of FFT with arbitrary precision

**URL:** <https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842>\
**Category:** General Usage\
**Tags:** question\
**Created:** [September 18, 2020, 1:03pm UTC](https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842 "2020-09-18T13:03:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![stakaz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stakaz/32/4740_2.png) [@stakaz](https://discourse.julialang.org/u/stakaz)\
**Post date:** [September 18, 2020, 1:03pm UTC](https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842/1 "2020-09-18T13:03:00Z")

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Hello, I wonder if anyone knows a package which implements a fft in multiple dimensions for arbitrary precision number (BigFloats).

I have not found any but I could imagine it exists.

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**Author:** ![simeonschaub](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/simeonschaub/32/216566_2.png) [@simeonschaub](https://discourse.julialang.org/u/simeonschaub)\
**Post date:** [September 18, 2020, 1:32pm UTC](https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842/2 "2020-09-18T13:32:34Z")

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It seems like FastTransforms.jl has this, but doesn’t document it anywhere:

[https://github.com/JuliaApproximation/FastTransforms.jl/blob/4a076c9fbacfe5201124cfe3b1d7002dbb0a8c7b/src/fftBigFloat.jl#L11](https://github.com/JuliaApproximation/FastTransforms.jl/blob/4a076c9fbacfe5201124cfe3b1d7002dbb0a8c7b/src/fftBigFloat.jl#L11)

You might want to open an issue about maybe documenting it a bit better. (Or even contribute docs yourself once you’ve figured out how it works.)

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**Author:** ![stakaz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stakaz/32/4740_2.png) [@stakaz](https://discourse.julialang.org/u/stakaz)\
**Post date:** [September 18, 2020, 1:33pm UTC](https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842/3 "2020-09-18T13:33:31Z")

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But it looks to me as it were only in 1d.

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**Author:** ![simeonschaub](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/simeonschaub/32/216566_2.png) [@simeonschaub](https://discourse.julialang.org/u/simeonschaub)\
**Post date:** [September 18, 2020, 1:35pm UTC](https://discourse.julialang.org/t/julian-implementation-of-fft-with-arbitrary-precision/46842/4 "2020-09-18T13:35:33Z")

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Ah, I see! I don’t know whether there’s anything for that then.