A Fast Fourier Transform (FFT) is an efficient algorithm to compute the Discrete Fourier Transform (DFT) and its inverse. There are many distinct FFT algorithms involving a wide range of mathematics, from simple complex-number arithmetic to group the

Least-squares algorithm to fit a three-dimensional plane, Mathematics is part of the subspace, Calculating a target and ocean echo power spectral density.

Using weighted model nodes in the network strength and weight are power law distribution, Mathematics is part of the subspace, Virtual power wireless sensor network coverage.