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Questions about decision problems that can be solved on nondeterministic Turing machines in time polynomial in the length of the input.
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Verifying Hamiltonian Cycle solution in O(n^2), n is the length of the encoding of G
In the textbook of CLRS, 'ch. 34.2 Polynomial-time verification' it says the following:
Suppose that a friend tells you that a given
graph G is hamiltonian, and then offers to prove it by giving …