Interval (mathematics)

Template:See also In mathematics, a (real) interval is a set o real nummers wi the property that ony nummer that lies atween twa nummers in the set is an aa includit in the set. For example, the set o aw nummers Template:Mvar satisfyin Template:Math is an interval which contains Template:Math an Template:Math, as well as aw nummers atween them. Ither examples o intervals are the set o aw real nummers $ℝ$, the set o aw negative real nummers, an the empty set.