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domain of a function
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set of "input" or argument values for which a function is defined
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.
Wikidata facts
- Subclass of
- domain of discourse
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- domain of discourse
- maintained by WikiProject
- WikiProject Mathematics
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Encyclopedic overview
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
Excerpted from Wikipedia’s “domain of a function” article, available under the CC BY-SA 4.0 licence.