What is another word for functional calculus?
Pronunciation: [fˈʌŋkʃənə͡l kˈalkjʊləs] (IPA) 
Functional calculus refers to the mathematical method used to compute the value of a function. It is a powerful tool that has found widespread application in various branches of mathematics and engineering. Synonyms for functional calculus include operational calculus, calculus of variations, function theory, and operator theory. Operational calculus is a branch of mathematics that deals with the calculation of functions, operators, and their derivatives. The calculus of variations is a branch of mathematics that studies variations or changes in the values of functions. Function theory is a branch of mathematics that deals with the study of the properties of functions. Finally, operator theory is a branch of mathematics that studies linear operators on a function space.
