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How NP got a new definition: a survey of probabilistically checkable proofs

Sanjeev Arora

cs.CCarXiv:cs/0304038

Abstract

We survey a collective achievement of a group of researchers: the PCP Theorems. They give new definitions of the class , and imply that computing approximate solutions to many -hard problems is itself -hard. Techniques developed to prove them have had many other consequences.

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