TY - GEN
T1 - Front-to-End Bidirectional Heuristic Search with Consistent Heuristics
T2 - 32nd International Joint Conference on Artificial Intelligence, IJCAI 2023
AU - Siag, Lior
AU - Shperberg, Shahaf
AU - Felner, Ariel
AU - Sturtevant, Nathan
N1 - Publisher Copyright:
© 2023 International Joint Conferences on Artificial Intelligence. All rights reserved.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - Recent research on bidirectional heuristic search (BiHS) is based on the must-expand pairs theory (MEP theory), which describes which pairs of nodes must be expanded during the search to guarantee the optimality of solutions. A separate line of research in BiHS has proposed algorithms that use lower bounds that are derived from consistent heuristics during search. This paper links these two directions, providing a comprehensive unifying view and showing that both existing and novel algorithms can be derived from the MEP theory. An extended set of bounds is formulated, encompassing both previously discovered bounds and new ones. Finally, the bounds are empirically evaluated by their contribution to the efficiency of the search.
AB - Recent research on bidirectional heuristic search (BiHS) is based on the must-expand pairs theory (MEP theory), which describes which pairs of nodes must be expanded during the search to guarantee the optimality of solutions. A separate line of research in BiHS has proposed algorithms that use lower bounds that are derived from consistent heuristics during search. This paper links these two directions, providing a comprehensive unifying view and showing that both existing and novel algorithms can be derived from the MEP theory. An extended set of bounds is formulated, encompassing both previously discovered bounds and new ones. Finally, the bounds are empirically evaluated by their contribution to the efficiency of the search.
UR - http://www.scopus.com/inward/record.url?scp=85170365864&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85170365864
T3 - IJCAI International Joint Conference on Artificial Intelligence
SP - 5631
EP - 5638
BT - Proceedings of the 32nd International Joint Conference on Artificial Intelligence, IJCAI 2023
A2 - Elkind, Edith
PB - International Joint Conferences on Artificial Intelligence
Y2 - 19 August 2023 through 25 August 2023
ER -