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Proceedings of the 13th Annual Symposium on Combinatorial Search (SoCS 2020)
Place of Conference
Cyberspace
Publisher
AAAI Press
Pages
57-65
Abstract
Stubborn sets are an optimality-preserving pruning technique for factored state-space search, for example in classical planning. Their applicability is limited by their computational overhead. We describe a new algorithm for computing stubborn sets that is based on the state variables of the state space, while previous algorithms are based on its actions. Typical factored state spaces tend to have far fewer state variables than actions, and therefore our new algorithm is much more efficient than the previous state of the art, making stubborn sets a viable technique in many cases where they previously were not.
