| C06FAF | Single one-dimensional real discrete Fourier transform, extra workspace for greater speed |
| C06FBF | Single one-dimensional Hermitian discrete Fourier transform, extra workspace for greater speed |
| C06FCF | Single one-dimensional complex discrete Fourier transform, extra workspace for greater speed |
| C06FFF | One-dimensional complex discrete Fourier transform of multidimensional data |
| C06FJF | Multidimensional complex discrete Fourier transform of multidimensional data |
| C06FKF | Circular convolution or correlation of two real vectors, extra workspace for greater speed |