The transfer function of the forward path of a control system

The transfer function of the feedback path of a control system

An electronic device used to generate a signal representing the periodic value of a given mathematical function, especially sine, square, triangle and sawtooth waveforms

(physics) The relationship between the energy of an electron and its ability to excite an atom to a particular excited state

(mathematics) Any function that is a solution of the Bessel equation

(computing) Any character used to specify a function of a piece of software or hardware (such as carriage return of a printer)

(mathematics) Any function of a complex variable that is holomorphic throughout the complex plane

(mathematics) Any function in which an independent variable appears in the form of a logarithm; they are the inverse functions of exponential functions

(mathematics) Any function whose value may be directly calculated from the independent variable.

(mathematics) Any function that is composed of algebraic functions, trigonometric functions, exponential functions and/or logarithmic functions, combined using addition, subtraction, multiplication and/or division