Nonconstructive tools for proving polynomial-time decidability (original) (raw)

Published: 01 June 1988 Publication History

Abstract

Recent advances in graph theory and graph algorithms dramatically alter the traditional view of concrete complexity theory, in which a decision problem is generally shown to be in P by producing an efficient algorithm to solve an optimization version of the problem. Nonconstructive tools are now available for classifying problems as decidable in polynomial time by guaranteeing only the existence of polynomial-time decision algorithms. In this paper these new methods are employed to prove membership in P for a number of problems whose complexities are not otherwise known. Powerful consequences of these techniques are pointed out and their utility is illustrated. A type of partially ordered set that supports this general approach is defined and explored.

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Published In

cover image Journal of the ACM

Journal of the ACM Volume 35, Issue 3

July 1988

280 pages

Copyright © 1988 ACM.

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 01 June 1988

Published in JACM Volume 35, Issue 3

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Michael R. Fellows

Michael A. Langston

Washington State Univ., Pullman