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Prove this is NP Complete, or it is in P. This problem is a variant of UNDIRECTED HAMILTON PATH in bounded-degree graphs The language in question is the set of all triples (G, s, t) for which G is an undirected graph with maximum degree at most 2 containing a Hamilton path from node s to node

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Answer #1

for the proof of Np-completeness we first show it belong to NP by certificate

certifiacte is the set of N vertices

now A problem is said to be in Np is if a solution verified in polynomial time.

in our case praposed solution is list of vetices

to check the solution 1 check all vertices are there or not and vertices are connected by an edge and last vertices are connected to 1 by an edge

so this give us order of n because there are n vertices and we have to check n edges so this can be done in polynomial time

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