A periodic function is a function which repeats over regular intervals, or, mathematically, for the entire domain of f. T is the fundamental period; the multiples of T are referred to as the periods of the function. The most well known and important periodic functions are the trigonometric functions, all with a period of 2π. File:Límite 01.svg This analysis-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.