DFS-tree based heuristic search

  • Authors:
  • Montserrat Abril;Miguel A. Salido;Federico Barber

  • Affiliations:
  • Dpt. of Information Systems and Computation, Technical University of Valencia, Valencia, Spain;Dpt. of Information Systems and Computation, Technical University of Valencia, Valencia, Spain;Dpt. of Information Systems and Computation, Technical University of Valencia, Valencia, Spain

  • Venue:
  • SARA'07 Proceedings of the 7th International conference on Abstraction, reformulation, and approximation
  • Year:
  • 2007

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Abstract

In constraint satisfaction, local search is an incomplete method for finding a solution to a problem. Solving a general constraint satisfaction problem (CSP) is known to be NP-complete; so that heuristic techniques are usually used. The main contribution of this work is twofold: (i) a technique for de-composing a CSP into a DFS-tree CSP structure; (ii) an heuristic search technique for solving DFS-tree CSP structures. This heuristic search technique has been empirically evaluated with random CSPs. The evaluation results show that the behavior of our heuristic outperforms than the behavior of a centralized algorithm.