Category:Functional Equations

This category contains results about Functional Equations.
Definitions specific to this category can be found in Definitions/Functional Equations.

Let $f$ be a real-valued or complex-valued function

A functional equation for $f$ is an equation of the form $\map f {x, y, \ldots} = 0$, where the expression for $f$ may contain

a finite number of independent variables

a finite number of either known or unknown functions

for which $f$ is to be solved.