(computing, database normalization) A constraint between two sets of attributes in a relation.

(mathematics) Any function of a polynomial whose greatest exponent is 4.

(physics) A function, denoted by Ai(x), that is a solution to the Airy equation.

(calculus) A function f : X→R (where X is a subset of R, possibly a discrete set) that either never decreases or never increases as its independent variable increases; that is, either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x).

(mathematics) A function to be maximized or minimized in optimization theory.

(biochemistry, genetics) A genomics branch that measures expression levels of RNAs and proteins to understand biological functions of a set of genes in cells.

(mathematics) A function from the real line to a finite subset of the real line.

(game theory) A mathematical function describing the award given to a single player at the outcome of a game.

plural of functional group

(mathematics) A function that either never decreases or never increases as its independent variable increases.