Optimal-generation variants of EPEA

Meir Goldenberg, Ariel Felner, Nathan Sturtevant, Robert C. Holte, Jonathan Schaeffer

Research output: Contribution to conferencePaperpeer-review

7 Scopus citations

Abstract

It is known that A* is optimal with respect to the expanded nodes (Dechter and Pearl 1985) (D&P). The exact meaning of this optimality varies depending on the class of algorithms and instances over which A* is claimed to be optimal. A* does not provide any optimality guarantees with respect to the generated nodes. However, such guarantees may be critical for optimally solving instances of domains with a large branching factor. In this paper, we introduce two new variants of the recently introduced Enhanced Partial Expansion A* algorithm (EPEA*) (Felner et al. 2012). We leverage the results of D&P to show that these variants possess optimality with respect to the generated nodes in much the same sense as A* possesses optimality with respect to the expanded nodes. The results in this paper are theoretical. A study of the practical performance of the new variants is beyond the scope of this paper.

Original languageEnglish
Pages89-97
Number of pages9
StatePublished - 1 Dec 2013
Event6th Annual Symposium on Combinatorial Search, SoCS 2013 - Leavenworth, WA, United States
Duration: 11 Jul 201313 Jul 2013

Conference

Conference6th Annual Symposium on Combinatorial Search, SoCS 2013
Country/TerritoryUnited States
CityLeavenworth, WA
Period11/07/1313/07/13

ASJC Scopus subject areas

  • Computer Networks and Communications

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