nonlogical symbol
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Non-logical symbol — In logic, the formal languages used to create expressions consist of symbols which can be broadly divided into constants and variables. The constants of a language can further be divided into logical symbols and non logical symbols (sometimes… … Wikipedia
Craig interpolation — In mathematical logic, Craig s interpolation theorem is a result about the relationship between different logical theories. Roughly stated, the theorem says that if a formula φ implies a formula ψ then there is a third formula ρ, called an… … Wikipedia
Logical consequence — Therefore redirects here. For the symbol, see therefore sign. Logical consequence is a fundamental concept in logic. It is the relation that holds between a set of sentences (or propositions) and a sentence (proposition) when the former entails… … Wikipedia
logic — logicless, adj. /loj ik/, n. 1. the science that investigates the principles governing correct or reliable inference. 2. a particular method of reasoning or argumentation: We were unable to follow his logic. 3. the system or principles of… … Universalium
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
Deconstruction — For the approach to post modern architecture, see Deconstructivism; for other uses, see Deconstruction (disambiguation). Deconstruction is a term introduced by French philosopher Jacques Derrida in his 1967 book Of Grammatology. Although he… … Wikipedia
Jacques Derrida — Derrida redirects here. For the documentary film, see Derrida (film). For the physicist, see Bernard Derrida. Jacques Derrida Full name Jacques Derrida Born July 15, 1930(1930 07 15) El Biar ( … Wikipedia
Zermelo–Fraenkel set theory — Zermelo–Fraenkel set theory, with the axiom of choice, commonly abbreviated ZFC, is the standard form of axiomatic set theory and as such is the most common foundation of mathematics.ZFC consists of a single primitive ontological notion, that of… … Wikipedia
