Essentially, the actual signal is obtained by a Convolution of the ideal signal with the impulse response function.
There is a very limited (100 copies) grey 180g vinyl edition of this album, which contains three additional remixes ("Galaxy" by War, Funckarma's "Spatial Convolution", and the second "All Is Full of Love" remix from björkmitfunkstörung), but omits "Bust It".
The existence of a fundamental solution for any operator with constant coefficients — the most important case, directly linked to the possibility of using convolution to solve an arbitrary right hand side — was shown by Bernard Malgrange and Leon Ehrenpreis.
Because of the multiplication-convolution property (Convolution theorem), the Fourier transform of a Gabor filter's impulse response is the convolution of the Fourier transform of the harmonic function and the Fourier transform of the Gaussian function.
His operational calculus is based upon an algebra of the convolution of functions with respect to the Fourier transform.