Difference between revisions of "Interval"
ComplexZeta (talk | contribs) (→Symbols: sometimes infinity and -infinity can be used as endpoints) |
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If an interval has either [ or ] on it, the values at the end ARE included. | If an interval has either [ or ] on it, the values at the end ARE included. | ||
| − | Note: <math>-\infty</math> and <math>\infty</math> are | + | Note: <math>-\infty</math> and <math>\infty</math> are generally not included as endpoints. |
== Examples == | == Examples == | ||
Revision as of 13:15, 11 July 2006
Definition
An interval is a range of values. The most common uses of an interval are for domain and range.
Symbols
If an interval has either ( or ) on it, the values at the end are NOT included.
If an interval has either [ or ] on it, the values at the end ARE included.
Note: 
and 
are generally not included as endpoints.
Examples
- (2,3) means all real values between 2 and 3, but not including 2 and 3
- [-2,0) means all real values between -2 and 0, but does not include 0
