"""Fast Fourier Transform functions.
Provides FFT routines backed by the OxiFFT-powered SciRS2 Rust implementation.
The API mirrors ``scipy.fft`` and ``numpy.fft`` for easy migration.
Functions
---------
fft : One-dimensional discrete Fourier transform
ifft : Inverse one-dimensional discrete Fourier transform
fft2 : Two-dimensional discrete Fourier transform
ifft2 : Inverse two-dimensional discrete Fourier transform
rfft : Real input FFT (returns only positive frequencies)
irfft : Inverse real FFT
fftfreq : DFT sample frequencies
rfftfreq : DFT sample frequencies for real input
"""
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