composite function
Noun
Meaning
composite function (plural composite functions)
(mathematics) A function of one or more independent variables, at least one of which is itself a function of one or more other independent variables; a function of function(s).
Synonyms
Examples
From this perspective the chain rule therefore says: : or for short, : That is, the Jacobian of a composite function is the product of the Jacobians of the composed functions (evaluated at the appropriate points).
While it is always possible to directly apply the definition of the derivative to compute the derivative of a composite function, this is usually very difficult.