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Noun: operational calculus
  1. A technique by which problems in analysis, in particular differential equations, are transformed into algebraic problems, usually the problem of solving a polynomial equation.
    "Guided greatly by intuition and his wealth of knowledge on the physics behind his circuit studies, [Heaviside] developed the operational calculus now ascribed to his name.";
    - operational analysis

Type of: calculus, infinitesimal calculus

Encyclopedia: Operational calculus