PSPACE is provable by two provers in one round

  • Authors:
  • Jin-yi Cai;Anne Condon;Richard J. Lipton

  • Affiliations:
  • -;-;-

  • Venue:
  • Journal of Computer and System Sciences
  • Year:
  • 1994

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Abstract

We show that every language in PSPACE, or equivalently, every language accepted by an unbounded round interactive proof system, ha a 1-round, 2-prover interactive proof system with exponentially small error probability. To obtain this result, we prove the correctness of a simple but powerful method for parallelizing 2-prover interactive proof systems to reduce their error.