Meaning of functional calculus in English:

functional calculus

noun

  • 1Mathematics
    Any of several methods for applying mathematical functions to mappings between vector spaces or modules.

  • 2Logic
    The branch of symbolic logic concerned with the internal structures of propositions containing arguments and quantifiers as well as the relations between them.

Origin

Early 19th century; earliest use found in Charles Babbage (1791–1871), mathematician and computer pioneer.