Oracle Machine: Computational Complexity Theory, Computability Theory, Abstract Machine, Decision Problem, Turing Machine, Oracle - Tapa blanda

Oracle Machine

Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. In complexitytheory and computability theory, an oracle machine is an abstractmachine used to study decision problems. It can be visualized as aTuring machine with a black box, called an oracle, which is able todecide certain decision problems in a single operation. The problem canbe of any complexity class. Even undecidable problems, like the haltingproblem, can be used.An oracle machine is a Turing machine connected toan oracle. The oracle, in this context, is thought of as an entitycapable of answering some collection of questions, and usuallyrepresented as some subset A of the natural numbers. Intuitively thenthe oracle machine can perform all of the usual operations of a Turingmachine, and can also query the oracle for an answer to a specificquestion of the form 'is x in A ' There are several differentdefinitions of an oracle machine, all of which are equivalent in thesense that they agree on when a specific function f can be computed byan oracle machine with oracle A.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 120 pp. Englisch. Nº de ref. del artículo: 9786131310041

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