Reciprocity theorem may refer to: Quadratic reciprocity, a theorem about modular arithmetic Cubic reciprocity Quartic reciprocity Artin reciprocity Weil reciprocity for algebraic curves Frobenius reciprocity theorem for group representations Stanley's reciprocity theorem for generating functions Reciprocity (engineering), theorems relating signals and the resulting responses including Reciprocity (electrical networks), a theorem relating voltages and currents in a network Reciprocity (electromagnetism), theorems relating sources and the resulting fields in classical electromagnetism Tellegen's theorem, a theorem about the transfer function of passive networks Reciprocity law for Dedekind sums Betti's theorem in linear elasticity The Triple Product rule, a formula relating the partial derivatives of three independent variables, often used in thermodynamics
See also Reciprocity (disambiguation)