A speculative theory that human language emerged from instinctive noises made by humans during physical exertion, and especially while involved in collective rhythmic labour.

An interpretation of electrodynamics derived from the assumption that the solutions of the electromagnetic field equations must be invariant under time-reversal transformation, as are the field equations themselves.

(mathematics, number theory) A branch of number theory in which suitable ideas and techniques from analytic number theory are generalised and applied to a variety of mathematical fields.

(mathematics) An axiomatic system that was proposed in the early 20th century in order to formulate a theory of sets free from paradoxes such as Russell's paradox, and became the standard form of axiomatic set theory.

plural of Kaluza-Klein theory

plural of arbitrage pricing theory

plural of grand unification theory

plural of Sturm-Liouville theory

plural of algebraic graph theory

plural of grand unified theory