domain of a function
set of "input" or argument values for which a function is defined
AI overview
A function's domain is the complete set of input values that you're allowed to plug into it. It matters because it tells you which numbers actually work with a particular function and which ones don't.
AI-generated from the Wikipedia summary — may contain errors.
Article
A function f from X to Y. The set of points in the red oval X is the domain of f. The set of points in the blue oval Y is the codomain of f. The set of points in the yellow oval is the range of f. Graph of the arcsine and arccosine functions, f(x) = arcsin(x) and f(x) = arccos(x), each of whose domain consists of the set of real numbers [–1,1] inclusively
In mathematics, the domain of a function is the set of inputs accepted by the function. It is sometimes denoted by