4.4    FFT
This directory contains files related to the use of Fast Fourier Transforms within Nektar++.
                                                                                
                                                                                
The two groups of files are as follows: 
 
     
     - NekFFTW.h/NekFFTW.cpp : Wrapper around FFTW library; and
     
- NektarFFT.h/NektarFFT.cpp : Fast Fourier Transform base class in Nektar++.