Fourier Transforms

f k −fx e ikx dx−∑n−c n∑n−c n e inx−e ikx dxe iknx dx f k 2 ∑ c n k n . (3.4.4)n−Thus the FS is a sum of delta functions and each is associated with a particular frequency(or harmonic) in the series.A series like (3.3.4) is sometimes called a row of delta functions. Furthermore the terms in(3.3.4) are spaced a unit distance apart, so may be considered as a periodic function.24