NP-easy : Complexity Class, Polynomial Time, Deterministic Turing Machine

Language: English

Published by Omniscriptum, 2010

3639972635 / 9783639972634

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nach der Bestellung gedruckt Neuware - Printed after ordering - Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. In complexitytheory, the complexity class NP-easy is the set of function problemsthat are solvable in polynomial time by a deterministic Turing machinewith an oracle for some decision problem in NP. In other words, aproblem X is NP-easy if and only if there exists some problem Y in NPsuch that X is polynomial-time Turing reducible to Y. This means thatgiven an oracle for Y, there exists an algorithm that solves X inpolynomial time (possibly by repeatedly using that oracle). NP-easy isanother name for FPNP (see the function problem article) or for F¿2P(see the polynomial hierarchy article). An example of an NP-easy problemis the problem of sorting a list of strings. The decision problem 'isstring A greater than string B' is in NP. There are algorithms such asQuicksort that can sort the list using only a polynomial number of callsto the comparison routine, plus a polynomial amount of additional work.Therefore, sorting is NP-easy.…

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Title
NP-easy : Complexity Class, Polynomial Time, Deterministic Turing Machine
Author
Lambert M. Surhone
Publisher
Omniscriptum
Publication year
2010
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
3639972635
ISBN 13
9783639972634
Item weight
137 grams
Dimensions
220x150x5 mm

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