6.1. Real Trigonometric FFT

Computes the Discrete Fourier Transform
of a rank-1 complex array, x. FAST_DFT

Computes the Discrete Fourier Transform (2DFT)
of a rank-2 complex array, x FAST_2DFT

Computes the Discrete Fourier Transform 2DFT)
of a rank-3 complex array, x FAST_3DFT

Forward transform FFTRF

Backward or inverse transform FFTRB

Initialization routine for FFTR* FFTRI

6.2. Complex Exponential FFT

Forward transform FFTCF

Backward or inverse transform FFTCB

Initialization routine for FFTC* FFTCI

6.3. Real Sine and Cosine FFTs

Forward and inverse sine transform FSINT

Initialization routine for FSINT FSINI

Forward and inverse cosine transform FCOST

Initialization routine for FCOST FCOSI

6.4. Real Quarter Sine and Quarter Cosine FFTs

Forward quarter sine transform QSINF

Backward or inverse transform QSINB

Initialization routine for QSIN* QSINI

Forward quarter cosine transform QCOSF

Backward or inverse transform QCOSB

Initialization routine for QCOS* QCOSI

6.5. Two- and Three-Dimensional Complex FFTs

Forward transform FFT2D

Backward or inverse transform FFT2B

Forward transform FFT3F

Backward or inverse transform FFT3B

6.6. Convolutions and Correlations

Real convolution RCONV

Complex convolution CCONV

Real correlation RCORL

Complex correlation CCORL

6.7. Laplace Transform

Inverse Laplace transform INLAP

Inverse Laplace transform for smooth functions SINLP