Definition that contains periodic function
- periodic law (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers
- fourier series the sum of a series of trigonometric expressions; used in the analysis of periodic functions
- harmonic analysis analysis of a periodic function into a sum of simple sinusoidal components
- mendeleev's law (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers
- fourier analysis analysis of a periodic function into a sum of simple sinusoidal components