Almost exactly two-hundred years ago, Baron Jean Baptiste Joseph Fourier (1768–1830,France) in his treatise The Analytical Theory of Heat proposed an idea that was quite controversial at the time: that any function defined over a closed interval, even those with a discontinuity, could be expressed as an infinite series of different frequency sine and cosine curves (see [4]). He was not completely correct –there are some extreme cases where the statement is not true – but it is safe to say that it is true in most cases.