Theorem | n. [ L. theorema, Gr. &unr_; a sight, speculation, theory, theorem, fr. &unr_; to look at, &unr_; a spectator: cf. F. théorème. See Theory. ] 1. That which is considered and established as a principle; hence, sometimes, a rule. [ 1913 Webster ] Not theories, but theorems (&unr_;), the intelligible products of contemplation, intellectual objects in the mind, and of and for the mind exclusively. Coleridge. [ 1913 Webster ] By the theorems, Which your polite and terser gallants practice, I re-refine the court, and civilize Their barbarous natures. Massinger. [ 1913 Webster ] 2. (Math.) A statement of a principle to be demonstrated. [ 1913 Webster ] ☞ A theorem is something to be proved, and is thus distinguished from a problem, which is something to be solved. In analysis, the term is sometimes applied to a rule, especially a rule or statement of relations expressed in a formula or by symbols; as, the binomial theorem; Taylor's theorem. See the Note under Proposition, n., 5. [ 1913 Webster ] Binomial theorem. (Math.) See under Binomial. -- Negative theorem, a theorem which expresses the impossibility of any assertion. -- Particular theorem (Math.), a theorem which extends only to a particular quantity. -- Theorem of Pappus. (Math.) See Centrobaric method, under Centrobaric. -- Universal theorem (Math.), a theorem which extends to any quantity without restriction. [ 1913 Webster ]
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