# Alfredo von Reckow

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In order to prove that the P class of problems is different to the NP class, we consider the satisfability problem of propositional calculus formulae, which is an NP-complete problem [1], [3]. It is shown that, for every search algorithm A, there is a set E(A) containing propositional calculus formulae, each of which requires the algorithm A to take a… (More)

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