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- From: pwp@moose.cs.indiana.edu (Paul Purdom)
- Newsgroups: comp.theory
- Subject: SAT
- Message-ID: <1992Sep1.183853.5844@news.cs.indiana.edu>
- Date: 1 Sep 92 18:38:36 GMT
- Sender: root@news.cs.indiana.edu (Operator)
- Organization: Computer Science, Indiana University
- Lines: 31
-
- This year there has been considerable interest in a simple greedy algorithm
- for finding a satisfying assignment of Boolean formulas in conjunctive
- normal form (SAT). The algorithm starts with an initial assignment of values
- to the variables. It then considers local changes to the assignment which
- reduce the number of clauses that are not satisfied. Algorithms of this
- nature have been published in
- 1. J. Gu, Efficient local search for very large-scale satisfiability problems,
- SIGART Bulletin 3(1):8-12, Jan. 1992.
- 2. Kazuo Iwama, Hidetoshi Abeta, and Eiji Miyano, Random Generation of
- Satisfiable and Unsatisfiable CNF Predicates, Algorithms, Software,
- Architecture, Information Processing 92, pp 322-328.
- 3. Elias Koutsoupias and Christos H. Papadimitrious, On the greedy algorithm
- for satisfiability, Information Processing Letters 43 (1992) pp 53-55.
-
- Also this algorithm was mentioned this year or last on the net (I don't
- remember who mentioned it). Although it has long been known that an algorithm
- of this nature could be applied to the SAT problem, it appears that it was
- just this year (or last) that people became aware that this was a promising
- algorithm.
-
- My question is: Does anyone know how it happened that a large number of
- researchers decided this year that this was a promising algorithm? Were there
- some earlier results on this algorithm, either published or unpublished, that
- increased the level of interest in this algorithm. In a quick reading of the
- above papers I did not see any indication of why the authors had chosen this
- algorithm to study. If I remember the note on this net correct, it took the
- view point that it was already common knowledge that this was a good
- algorithm. If so, it was common knowledge that I had been unaware of.
-
- I will appreciate any help that people can give on trackinng down the origin
- of the recent interest in this algorithm.
-