Can the empty set be written in interval form as (infinity, infinity) or (infinity,a) U (b, infinity)?

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- Feb 8th 2010, 04:15 PMsummerset353Empty set
Can the empty set be written in interval form as (infinity, infinity) or (infinity,a) U (b, infinity)?

- Feb 8th 2010, 04:21 PMNyrox
Of course: $\displaystyle ]a,b[$ where $\displaystyle a>b$

- Feb 8th 2010, 04:22 PMPlato