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For questions related to the family of algorithms often denoted as best-first search algorithms. A* is an example of a best-first search algorithm.

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Why is the space-complexity of greedy best-first search is $\mathcal{O}(b^m)$?

I was struggling with the same question. This is what I came up with after thinking it through. With depth-first-search, you backtrack to a node that is a non-expanded child of your parent (or the par …
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