V Alcázar, P Riddle, M Barley - Proceedings of the AAAI Conference on …, 2020 - ojs.aaai.org
In the past few years, new very successful bidirectional heuristic search algorithms have been proposed. Their key novelty is a lower bound on the cost of a solution that includes …
S Shperberg, A Felner, S Shimony… - Proceedings of the …, 2019 - ojs.aaai.org
Recent work in bidirectional heuristic search characterize pairs of nodes from which at least one node must be expanded in order to ensure optimality of solutions. We use these …
We present MM, the first bidirectional heuristic search algorithm whose forward and backward searches are guaranteed to''meet in the middle'', ie never expand a node beyond …
It is well-known that any admissible unidirectional heuristic search algorithm must expand all states whose $ f $-value is smaller than the optimal solution cost when using a consistent …
E Shaham, A Felner, J Chen, N Sturtevant - Proceedings of the …, 2017 - ojs.aaai.org
A* is optimal among admissible unidirectional algorithms when searching with a consistent heuristic. Recently, similar optimality bounds have been established for bidirectional search …
Bidirectional search algorithms interleave two separate searches, a normal search forward from the start state, and a search backward from the goal. It is well known that adding a …
Bidirectional search algorithms interleave a search forward from the start state (start) and a search backward (ie using reverse operators) from the goal state (goal). We say that the two …
Recently there has been renewed interest in bidirectional heuristic search. New algorithms, eg, MM, MMe, and NBS, have been introduced which seem much closer to refuting the …
Most recent theoretical and algorithmic work in bidirectional heuristic search (BiHS) used front-to-end (F2E) heuristics that estimate the distance to the start and goal states. In this …