Please answer the following question in detail. With all the proofs and assumptions explained.   We have seen various search strategies in class, and analyzed their worst-case running time. Prove that any deterministic search algorithm will, in the worst case, search the entire state space. More formally, we define a search problem by a finite set of states S, a set of actions A, and a cost function c : S ×A×S → {1,∞} (i.e. the cost is uniform, but some states cannot be reached from some others, or equivalently have a cost of ∞), and a starting state s0 ∈ S. We assume that every state s ∈ S is reachable from s0, i.e. that there is a sequence of actions one can take from state s0 such that one reaches the state s after performing this sequence of actions, and such that the cost of reaching s is finite. Prove the following theorem. Theorem1. LetAlgbesomecomplete, deterministic uninformed search algorithm. Then for any search problem defined as above, there exists some choice of a state s∗ ∈ S such that Alg checks every state in S.

Operations Research : Applications and Algorithms
4th Edition
ISBN:9780534380588
Author:Wayne L. Winston
Publisher:Wayne L. Winston
Chapter11: Nonlinear Programming
Section11.3: Convex And Concave Functions
Problem 13P
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Please answer the following question in detail. With all the proofs and assumptions explained.

 

We have seen various search strategies in class, and analyzed their worst-case running time. Prove that any deterministic search algorithm will, in the worst case, search the entire state space. More formally, we define a search problem by a finite set of states S, a set of actions A, and a cost function c : S ×A×S → {1,∞} (i.e. the cost is uniform, but some states cannot be reached from some others, or equivalently have a cost of ∞), and a starting state s0 ∈ S. We assume that every state s ∈ S is reachable from s0, i.e. that there is a sequence of actions one can take from state s0 such that one reaches the state s after performing this sequence of actions, and such that the cost of reaching s is finite. Prove the following theorem. Theorem1. LetAlgbesomecomplete, deterministic uninformed search algorithm. Then for any search problem defined as above, there exists some choice of a state s∗ ∈ S such that Alg checks every state in S.

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