plural of Heaviside unit function

plural of spatial wave function

plural of Riemann zeta function

(mathematics) A function which, when applied a given number of times, equals another given function.

(computing theory) A function from (state, input symbol) to state describing what state to move to on receiving a given input in a given state.

(organic chemistry) A specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class.

(computing theory) Capable of computing any recursive function.

(mathematical analysis) Any function that is algebraically independent of its variable(s); a function which does not satisfy a polynomial equation whose coefficients are themselves polynomials.

(mathematical analysis) Any function that is defined for all positive integers, and has values that are either real or complex.

(trigonometry) Any function of an angle expressible as the ratio of two of the sides of a right triangle that has that angle (e.g., sine), or that subtracts 1 from such a ratio or subtracts such a ratio from 1 (e.g., coversed sine).