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2006

Dual Search in Permutation State Spaces

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Dual Search in Permutation State Spaces
Geometrical symmetries are commonly exploited to improve the efficiency of search algorithms. We introduce a new logical symmetry in permutation state spaces which we call duality. We show that each state has a dual state. Both states share important attributes and these properties can be used to improve search efficiency. We also present a new search algorithm, dual search, which switches between the original state and the dual state when it seems likely that the switch will improve the chances of a cutoff. The decision of when to switch is very important and several policies for doing this are investigated. Experimental results show significant improvements for a number of applications.
Uzi Zahavi, Ariel Felner, Robert Holte, Jonathan S
Added 30 Oct 2010
Updated 30 Oct 2010
Type Conference
Year 2006
Where AAAI
Authors Uzi Zahavi, Ariel Felner, Robert Holte, Jonathan Schaeffer
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