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Home / Proceedings / Proceedings of the International Symposium on Combinatorial Search

Understanding the Search Behaviour of Greedy Best-First Search

February 1, 2023

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Authors

Manuel Heusner,Thomas Keller,Malte Helmert

University of Basel,University of Basel,University of Basel


DOI:

10.1609/socs.v8i1.18425


Abstract:

A classical result in optimal search shows that A* with an admissible and consistent heuristic expands every state whose f-value is below the optimal solution cost and no state whose f-value is above the optimal solution cost. For satisficing search algorithms, a similarly clear understanding is currently lacking. We examine the search behaviour of greedy best-first search (gbfs) in order to make progress towards such an understanding. We introduce the concept of high-water mark benches, which separate the search space into areas that are searched by a gbfs algorithm in sequence. High-water mark benches allow us to exactly determine the set of states that are not expanded under any gbfs tie-breaking strategy. For the remaining states, we show that some are expanded by all gbfs searches, while others are expanded only if certain conditions are met.

Topics: SOCS

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HOW TO CITE:

Manuel Heusner,Thomas Keller,Malte Helmert Understanding the Search Behaviour of Greedy Best-First Search Proceedings of the International Symposium on Combinatorial Search (2017) 47-55.

Manuel Heusner,Thomas Keller,Malte Helmert Understanding the Search Behaviour of Greedy Best-First Search SOCS 2017, 47-55.

Manuel Heusner,Thomas Keller,Malte Helmert (2017). Understanding the Search Behaviour of Greedy Best-First Search. Proceedings of the International Symposium on Combinatorial Search, 47-55.

Manuel Heusner,Thomas Keller,Malte Helmert. Understanding the Search Behaviour of Greedy Best-First Search. Proceedings of the International Symposium on Combinatorial Search 2017 p.47-55.

Manuel Heusner,Thomas Keller,Malte Helmert. 2017. Understanding the Search Behaviour of Greedy Best-First Search. "Proceedings of the International Symposium on Combinatorial Search". 47-55.

Manuel Heusner,Thomas Keller,Malte Helmert. (2017) "Understanding the Search Behaviour of Greedy Best-First Search", Proceedings of the International Symposium on Combinatorial Search, p.47-55

Manuel Heusner,Thomas Keller,Malte Helmert, "Understanding the Search Behaviour of Greedy Best-First Search", SOCS, p.47-55, 2017.

Manuel Heusner,Thomas Keller,Malte Helmert. "Understanding the Search Behaviour of Greedy Best-First Search". Proceedings of the International Symposium on Combinatorial Search, 2017, p.47-55.

Manuel Heusner,Thomas Keller,Malte Helmert. "Understanding the Search Behaviour of Greedy Best-First Search". Proceedings of the International Symposium on Combinatorial Search, (2017): 47-55.

Manuel Heusner,Thomas Keller,Malte Helmert. Understanding the Search Behaviour of Greedy Best-First Search. SOCS[Internet]. 2017[cited 2023]; 47-55.


ISSN: 2832-9163


Published by AAAI Press, Palo Alto, California USA
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