The fast Fourier transform, forward and inverse, has found many applications in signal processing ... Some codings are dedicated to real input/output only, others for complex input/output only, or ...

There has been a growing interest in the use of Fourier analysis to examine questions of accuracy and stability of numerical methods for solving partial differential equations. This kind of analysis ...

leading to the Riesz-Fischer theorem, which embodies the definition of mean convergence. Chap, i introduces the Fourier transforms: ...