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Definitions:
Noun
                                                
                        
                            Fourier analysis
                        
                                                
                        
                            harmonic analysis
                        
                                                
                                                    
                
                    
                    Definition: analysis of a periodic function into a sum of simple sinusoidal components
Definition: A study of the representation of functions or signals as the superposition of basic waves, involving the notions of harmonic functions, trigonometric series, Fourier series, Fourier transforms, almost periodic functions, and others.