147148149150151152153154155156157
DoubleFFT_1D fft = CACHE_1D.get(n); if (fft == null) { fft = new DoubleFFT_1D(n); CACHE_1D.put(n, fft); } fft.realInverseFull(a, scale); return unpackFull(a); } /** * The forward discrete Fourier transform. *Note:* In this definition $-i$