This is a list of some well-known periodic functions. The constant function , where is independent of , is periodic with any period, but lacks a fundamental period. A definition is given for some of the following functions, though each function may have many equivalent definitions.
All trigonometric functions listed have period , unless otherwise stated. For the following trigonometric functions:
The following functions have period and take as their argument. The symbol is the floor function of and is the sign function.
K means Elliptic integral K(m)