05_uninformed_search2013

N assume solution is at depth d n worst case expand

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Unformatted text preview: of BFS n༆  n༆  Completeness: q༇  YES Time complexity: q༇  Assume a state space where every state has b successors. n༆  Assume solution is at depth d n༆  Worst case: expand all but the last node at depth d n༆  Total number of nodes expanded: b + b 2 + b 3 + ... + b d + (b d +1 − b) = O(b d +1 ) € 5 9/20/13 Evaluation of BFS n༆  n༆  Uninformed Search Completeness: Time complexity: q༇  q༇  YES Total number of nodes expanded: b + b 2 + b 3 + ... + b d + (b d +1 − b) = O(b d +1 ) n༆  Space complexity: q༇  Lecture 10: 9/20/13 Same, if each node is retained in memory € Evaluation of BFS n༆  Completeness: q༇  n༆  YES Time complexity: q༇  Space complexity: q༇  n༆  € Same, if each node is retained in memory Optimality: q༇  n༆  n༆  Memory requirements are a bigger problem than its execution time. Exponential complexity search problems cannot be solved by uninformed search methods for any but the s...
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