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The cost of computation for Fourier coefficients can be reduced by ___________

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in Computational Fluid Dynamics by (118k points)
The cost of computation for Fourier coefficients can be reduced by ___________

(a) FFT

(b) DFT

(c) IDFT

(d) IFT

This question was posed to me in a national level competition.

I'm obligated to ask this question of Finite Difference Methods in portion Finite Difference Methods of Computational Fluid Dynamics

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The correct answer is (a) FFT

The explanation: FFT stands for Fast Fourier Transform which is an algorithm for finding Discrete Fourier Transform (DFT) of a sequence or the Inverse Discrete Fourier Transform (IDFT). This is used to reduce the computational cost.

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