ABSTRACT
The importance of Fourier analysis in general is put forth very well by Leon Cohen [12]:
. . . Bunsen and Kirchhoff, observed (around 1865) that light spectra can be used for recognition, detection, and classification of substances because they are unique to each substance. This idea, along with its extension to other waveforms and the invention of the tools needed to carry out spectral decomposition, certainly ranks as one of the most important discoveries in the history of mankind.
