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Erschienen in:
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2013 | OriginalPaper | Buchkapitel

1. Preliminaries

verfasst von : Rodney G. Downey, Michael R. Fellows

Erschienen in: Fundamentals of Parameterized Complexity

Verlag: Springer London

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Abstract

We give basic results and definitions in classical complexity theory. These include NP- and PSpace-completeness, concrete Karp and Cook reductions, the Cook–Levin Theorem, and the Stockmeyer–Meyer Theorem. We introduce some ideas, such as advice classes and randomized reductions, that will be of use later in the book.

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Fußnoten
1
This theorem states that if we consider polynomial-time algorithms that have access to an oracle giving the number of accepting paths on a non-deterministic polynomial-time Turing machine (P#P) then we can compute any level of the polynomial-time hierarchy in polynomial time; that is, PH⊆P#P.
 
2
This is a characterization of NP in terms of “polynomially checkable proofs,” which is beyond the scope of this book.
 
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Metadaten
Titel
Preliminaries
verfasst von
Rodney G. Downey
Michael R. Fellows
Copyright-Jahr
2013
Verlag
Springer London
DOI
https://doi.org/10.1007/978-1-4471-5559-1_1