proof rules

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• Proof theory — is a branch of mathematical logic that represents proofs as formal mathematical objects, facilitating their analysis by mathematical techniques. Proofs are typically presented as inductively defined data structures such as plain lists, boxed… …   Wikipedia

• Proof — • The establishment of a disputed or controverted matter by lawful means or arguments. Catholic Encyclopedia. Kevin Knight. 2006. Proof     Proof      …   Catholic encyclopedia

• Proof-of-payment — or POP is an honor based fare collection approach used on many public transportation systems. Instead of checking each passenger as they enter a fare control zone, proof of payment requires that each passenger carry a ticket or pass proving that… …   Wikipedia

• Rules of evidence — govern whether, when, how, and for what purpose proof of a case may be placed before a trier of fact for consideration. In the judicial systems of Canada and the United States, the trier of fact may be a judge or a jury, depending on the purpose… …   Wikipedia

• Proof-theoretic semantics — is an approach to the semantics of logic that attempts to locate the meaning of propositions and logical connectives not in terms of interpretations, as in Tarskian approaches to semantics, but in the role that the proposition or logical… …   Wikipedia

• Proof sketch for Gödel's first incompleteness theorem — This article gives a sketch of a proof of Gödel s first incompleteness theorem. This theorem applies to any formal theory that satisfies certain technical hypotheses which are discussed as needed during the sketch. We will assume for the… …   Wikipedia

• Proof calculus — In mathematical logic, a proof calculus corresponds to a family of formal systems that use a common style of formal inference for its inference rules. The specific inference rules of a member of such a family characterize the theory of a… …   Wikipedia

• proof — /proohf/, n. 1. evidence sufficient to establish a thing as true, or to produce belief in its truth. 2. anything serving as such evidence: What proof do you have? 3. the act of testing or making trial of anything; test; trial: to put a thing to… …   Universalium

• Proof of impossibility — A proof of impossibility, sometimes called a negative proof or negative result , is a proof demonstrating that a particular problem cannot be solved, or cannot be solved in general. Often proofs of impossibility have put to rest decades or… …   Wikipedia

• proof — The effect of evidence; the establishment of a fact by evidence. New England Newspaper Pub. Co. v. Bonner, C.C.A.Mass., 77 F.2d 915, 916. Any fact or circumstance which leads the mind to the affirmative or negative of any proposition. The… …   Black's law dictionary

• Proof of Life — Infobox Film name = Proof of Life caption = Theatrical poster director = Taylor Hackford producer = Executive Producers: Tony Gilroy Steven Reuther Producers: Taylor Hackford Charles Mulvehill writer = Tony Gilroy starring = Russell Crowe Meg… …   Wikipedia