Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Exponential F series?
express periodic impulse delta T = sigma of (delta (t-nT) for n from - to + infinity in terms of exponential Fourier series Cn using exponential Fourier series.
1 Answer
- shimrodLv 41 decade agoFavorite Answer
Straightforward. Set:
Sum_n delta(t - nT) = Sum_k=-oo^+oo C_k exp(i 2 pi k t/T)
Multiply both sides by exp(-i 2 pi m t/T) and integrate from -T/2 to T/2 to get the coefficients C_k = 1/T -->
Sum_n delta(t - nT) = (1/T) Sum_k=-oo^+oo exp(i 2 pi k t/T)