noun
open interval
Mathematics term for an interval that does not include its endpoints, e.g. (a, b). Contrasts with 閉区間 (closed interval).
See also: 閉区間
開区間 (0, 1) には 0 と 1 は含まれない。
The open interval (0, 1) does not include 0 or 1.
この関数
This function is continuous on the open interval.