A mathematical technique for finding an approximate solution to a problem that cannot be solved exactly, by starting from the exact solution of a related problem; used in modelling physical interactions between particles, etc.

(physics) A mathematical approach to developing a theory of everything in theoretical physics, based on quantizing spacetime into units called metrons.

(physics) The theory that (most) baryons and mesons are composed of bound quarks and antiquarks.

(uncountable, algebra, algebraic geometry, algebraic topology) The study of rings R generated by the set of vector bundles over some topological space or scheme;

plural of theoretical probability

(mathematics, uncountable) The study of the properties of dynamic systems over large timescales.

(topology) The branch of topology devoted to the study of continua, a type of metric space.

(psychology) The ability to form an opinion about what other people are thinking.

plural of theobromide

plural of theobromine