(algebra) An element of an algebraic structure, generally denoted 0, which is an identity for an additive operation (generally denoted +). That is, x + 0 = 0 + x = x for any x in the structure.

Any non-food substance added to food in order to improve its flavour, appearance or shelf life

(mathematics) The inverse with respect to addition; the opposite.

(mathematics) A unary function that preserves the addition operation; a unary function f such that for any x and y: f(x + y) = f(x) + f(y).

plural of food additive

(group theory) Any (often, but not necessarily, abelian) group whose binary operation is called addition.

(mathematical analysis) The following property of a measure: that the measure of a countable union of disjoint sets is equal to the sum of their measures.

(mathematical analysis) Of a measure: that satisfies countable additivity.

(mathematical analysis) Alternative form of σ-additivity

(mathematical analysis) countable additivity