(mathematics) A neighborhood of a point in a space with an order, minus the point itself.

plural of unit interval

(mathematics) an interval in the real number line which does not contain its supremum and infimum. If specified by a pair of real numbers, then it consists of all the points on the real line whose values lie strictly between those two real numbers.

plural of serial interval

(music) the distance between notes only regarding the distance on the staff

plural of major interval

(music) An interval that is increased one half step from either a major interval or a perfect interval.

(music) an interval that is either a major second, major third, major sixth, or a major seventh

plural of augmented interval

(music) An interval that is decreased from either a minor interval or a perfect interval.