Notation Question

How is defined for some interval on ? Is it just , that is, the Supremum of the interval minus the Infimum?

Thanks in advance.

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Originally Posted by Swlabr

How is defined for some interval on ? Is it just , that is, the Supremum of the interval minus the Infimum?

Thanks in advance.

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Yes. More specifically, any interval, I, on R can be written in one of the forms (a, b), [a, b), (a, b], or [a, b]. In all of those cases .