logical 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

• Logical constant — In symbolic logic, a logical constant of a language L is a symbol that has the same semantic value in all models of (the expressions of) L . Two important types of logical constants are logical connectives and quantifiers. The equality predicate… …   Wikipedia

• Logical positivism — (also known as logical empiricism, scientific philosophy, and neo positivism) is a philosophy that combines empiricism the idea that observational evidence is indispensable for knowledge with a version of rationalism incorporating mathematical… …   Wikipedia

• Logical truth — is one of the most fundamental concepts in logic, and there are different theories on its nature. A logical truth is a statement which is true and remains true under all reinterpretations of its components other than its logical constants. It is… …   Wikipedia

• Logical connective — This article is about connectives in classical logic. For connectors in natural languages, see discourse connective. For connectives and operators in other logics, see logical constant. For other logical symbols, see table of logic symbols. In… …   Wikipedia

• Logical disjunction — Disjunction redirects here. For separation of chromosomes, see Meiosis. For disjunctions in distribution, see Disjunct distribution. Venn diagram of the logical disjunction of A and B …   Wikipedia

• Logical NOR — This article is about NOR in the logical sense. For the electronic gate, see NOR gate. For other uses, see Nor. Venn diagram of In boolean logic, logical nor or joint denial is a truth functional operator which produces a result that is the… …   Wikipedia

• Logical implication — In logic and mathematics, logical implication is a logical relation that holds between a set T of formulae and a formula B when every model (or interpretation or valuation) of T is also a model of B . In symbols,# T models B, # T Rightarrow B # T …   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

• Logical conjunction — ∧ redirects here. For exterior product, see exterior algebra. Venn diagram of …   Wikipedia

• Logical equality — For the corresponding concept in combinational logic, see XNOR gate. XNOR Logic Gate Symbol Logical equality is a logical operator that corresponds to equality in Boolean algebra and to the logical biconditional in propositional calculus. It… …   Wikipedia