1*c4762a1bSJed Brown 2*c4762a1bSJed Brown 1 dimensions: FFTW on vector of size 12 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown 2 dimensions: FFTW on vector of size 144 5*c4762a1bSJed Brown 6*c4762a1bSJed Brown 3 dimensions: FFTW on vector of size 1728 7*c4762a1bSJed Brown 8*c4762a1bSJed Brown 4 dimensions: FFTW on vector of size 20736 9