Sheffer-stroke operation

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• Sheffer stroke — This article is about the logical NAND operator. For the electronic NAND gate, see Negated AND gate. For other uses, see Nand (disambiguation). Venn diagram of In Boolean functions and propositional calculus, the Sheffer stroke, named after …   Wikipedia

• Henry M. Sheffer — Henry Maurice Sheffer (1882 1964) was an American logician.Sheffer was a Polish Jew born in the Ukraine, who immigrated to the USA with his parents. He was educated at Harvard University, learning logic from Josiah Royce. Sheffer spent most of… …   Wikipedia

• Shefferscher Strich — Venn Diagramm von A | B Die Sheffer Funktion ist die Negation des logischen und. Im rot markierten Bereich ist die Funktion wahr, also genau da, wo und falsch ist. Der Sheffersche Strich (auch Sheffer stroke, Sheffer Strich, Sheffer Funktion oder …   Deutsch Wikipedia

• logic, history of — Introduction       the history of the discipline from its origins among the ancient Greeks to the present time. Origins of logic in the West Precursors of ancient logic       There was a medieval tradition according to which the Greek philosopher …   Universalium

• Logic gate — A logic gate is an idealized or physical device implementing a Boolean function, that is, it performs a logical operation on one or more logic inputs and produces a single logic output. Depending on the context, the term may refer to an ideal… …   Wikipedia

• Tractatus Logico-Philosophicus — is the only book length work published by Austrian philosopher Ludwig Wittgenstein. He wrote it as a soldier and a prisoner of war during World War I. First published in German in 1921 as Logisch Philosophische Abhandlung , it is now widely… …   Wikipedia

• History of logic — Philosophy ( …   Wikipedia

• Boolean algebras canonically defined — Boolean algebras have been formally defined variously as a kind of lattice and as a kind of ring. This article presents them more neutrally but equally formally as simply the models of the equational theory of two values, and observes the… …   Wikipedia

• Boolean algebra (logic) — For other uses, see Boolean algebra (disambiguation). Boolean algebra (or Boolean logic) is a logical calculus of truth values, developed by George Boole in the 1840s. It resembles the algebra of real numbers, but with the numeric operations of… …   Wikipedia

• Peirce, Charles Sanders — American pragmatism Peirce Cheryl Misak INTRODUCTION Charles Sanders Peirce (1839–1914), one of America’s greatest philosophers, mathematicians, and logicians, was a difficult and not altogether pleasant character. That, combined with what the… …   History of philosophy

• 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