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examples of periodic functions


We list common periodic functions. In the parentheses, there are given their period with least modulusMathworldPlanetmathPlanetmathPlanetmath.

  • One-periodic functionsMathworldPlanetmath with a real period:

    sine (2π), cosine (2π), tangentMathworldPlanetmathPlanetmathPlanetmath (π), cotangent (π), secant (2π), cosecant (2π), and functions depending on them – especially the triangular-wave function (2π);  the mantissa function x-x (1).

  • One-periodic functions with an imaginary (http://planetmath.org/ImaginaryNumber) period:

    exponential functionDlmfDlmfMathworldPlanetmath (2iπ), hyperbolic sineMathworldPlanetmath (2iπ), hyperbolic cosine (2iπ), hyperbolic tangent (iπ), hyperbolic cotangent (iπ), and functions depending on them.

  • Two-periodic functions:  elliptic functionsMathworldPlanetmath.

  • Functions with infinitely (http://planetmath.org/InfiniteMathworldPlanetmath) many periods:

    the Dirichlet’s function

    f:x {1whenx0whenx

    has any rational number as its period;  a constant functionMathworldPlanetmath has any number as its period.

Title examples of periodic functions
Canonical name ExamplesOfPeriodicFunctions
Date of creation 2013-03-22 17:57:29
Last modified on 2013-03-22 17:57:29
Owner pahio (2872)
Last modified by pahio (2872)
Numerical id 10
Author pahio (2872)
Entry type Example
Classification msc 30A99
Classification msc 26A09
Synonym common periodic functions
Related topic PeriodicityOfExponentialFunction
Related topic HyperbolicIdentities
Related topic RationalAndIrrational
Related topic PeriodicFunctions
Related topic FloorFunction
Related topic Floor