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harmonic function
(mathematics) A function of two, three or n variables which is a solution to any of Laplace's equations
point function
(mathematics) Any function whose values are points
predefined function
(computing) Any of a set of subroutines that perform standard mathematical functions included in a programming language; either included in a program at compilation time, or called when a program is executed
power function
(mathematics) A function where the independent variable is raised to a particular real number power.
periodic function
(mathematics) Any function whose value repeats after the regular addition of a period to its independent variable; i.e., a function ƒ such that, for some positive constant p, ƒ(x + p) = ƒ(x) for all x.
penalty function
(mathematics) Any function that applies constraints to a maximum or minimum problem
orthogonal function
(mathematics) Either of a pair of functions whose inner product is zero
partial function
(mathematics) A function whose domain is a subset of the set on which it is formally defined; i.e., a function f: X→Y for which values f(x) are defined only for x ∈ W, where W ⊆ X.
orthonormal function
(mathematics) An orthogonal function whose inner product with itself is unity
odd function
(mathematics) Any function whose value changes sign if the independent variable changes sign i.e. f(-x) = -f(x)