c06ea calculates the discrete Fourier transform of a sequence of $n$ real data values. (No extra workspace required.)

c06eb calculates the discrete Fourier transform of a Hermitian sequence of $n$ complex data values. (No extra workspace required.)

c06fp computes the discrete Fourier transforms of $m$ sequences, each containing $n$ real data values. This method is designed to be particularly efficient on vector processors.

c06fq computes the discrete Fourier transforms of $m$ Hermitian sequences, each containing $n$ complex data values. This method is designed to be particularly efficient on vector processors.

c06gb forms the complex conjugate of a Hermitian sequence of $n$ data values.

c06gq forms the complex conjugates of $m$ Hermitian sequences, each containing $n$ data values.

c06gs takes $m$ Hermitian sequences, each containing $n$ data values, and forms the real and imaginary parts of the $m$ corresponding complex sequences.