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2. Domain of a function - Wikipedia

   en.wikipedia.org/wiki/Domain_of_a_function

   The term domain is also commonly used in a different sense in mathematical analysis: a domain is a non-empty connected open set in a topological space. In particular, in real and complex analysis , a domain is a non-empty connected open subset of the real coordinate space R n {\displaystyle \mathbb {R} ^{n}} or the complex coordinate space C n ...

3. Interval (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Interval_(mathematics)

   In summary, a set of the real numbers is an interval, if and only if it is an open interval, a closed interval, or a half-open interval. [ 4 ] [ 5 ] A degenerate interval is any set consisting of a single real number (i.e., an interval of the form [ a , a ] ). [ 6 ]

4. Domain (mathematical analysis) - Wikipedia

   en.wikipedia.org/wiki/Domain_(mathematical_analysis)

   In complex analysis, a complex domain (or simply domain) is any connected open subset of the complex plane C. For example, the entire complex plane is a domain, as is the open unit disk, the open upper half-plane, and so forth. Often, a complex domain serves as the domain of definition for a holomorphic function.

5. Interval arithmetic - Wikipedia

   en.wikipedia.org/wiki/Interval_arithmetic

   The main objective of interval arithmetic is to provide a simple way of calculating upper and lower bounds of a function's range in one or more variables. These endpoints are not necessarily the true supremum or infimum of a range since the precise calculation of those values can be difficult or impossible; the bounds only need to contain the function's range as a subset.

6. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   When no confusion is possible, notation f(S) is commonly used. [ , ] 1. Closed interval: if a and b are real numbers such that , then [,] denotes the closed interval defined by them. 2. Commutator (group theory): if a and b belong to a group, then [,] =. 3.

7. Template:Interval - Wikipedia

   en.wikipedia.org/wiki/Template:Interval

   This template determines which interval a given value lies in. The intervals are defined by the unnamed parameters. The value to be determined is named parameter n. format=time can also be passed to the template. If set, the intervals and value will be compared as times (and if n is not provided, it will evaluate as the current timestamp).