Alternative form of gain of function

(databases) A function that performs a calculation using values from several rows, but does not group them into a single row.

(mathematics) A function whose domain is a subset of its codomain, and for which all of the elements in its domain are fixed points.

(mathematics) A function yielding the sum of the divisors of an integer. It is denoted by the Greek letter σ (sigma).

(mathematics) An element of the range of a function. (Or, employing the "machine" metaphor, it is one of the "outputs" of a function.)

(signal processing) A discrete window function, w(n)=1/2;(1- cos ((2𝜋n)/(N-1))), typically used to select a subset of a series of samples in order to perform a Fourier transform or other calculation.

(biology) A reproductive strategy in some amphibians wherein the male will inseminate a fresh newly-dead female corpse, fertilizing the still viable eggs, and then squeezing the corpse to eject the newly fertilized eggs into the water.

Any of various specific mathematical functions that have more or less established names and notations due to their importance.

(mathematics) Any of the elements of the Bloch space.

(economics) A function that describes the relationship between consumption and disposable income.