Example image of eyePlorer eyePlorer map for 'Fast Fourier transform': Algorithm Discrete Fourier transform Complex number Group theory Number theory Sequence Big O notation Order of magnitude Proportionality (mathematics) Digital signal processing Multiplication algorithm Partial differential equation Computational complexity theory Factorization Finite field Number-theoretic transform Prime number Root of unity Round-off error Upper and lower bounds Power of two Cache Pipeline (computing) Arithmetic complexity of the discrete Fourier transform Shmuel Winograd Graph (mathematics) Split-radix FFT algorithm Discrete cosine transform Discrete Hartley transform Floating point Fast multipole method Parallel computing Wavelet Approximation error Root mean square Generating trigonometric tables Trigonometric functions Fixed-point arithmetic Cooley–Tukey FFT algorithm Composite number Divide and conquer algorithm Recursion Twiddle factor Carl Friedrich Gauss James Cooley John Tukey Chinese remainder theorem Coprime Prime-factor FFT algorithm Central processing unit