Strong Parallel Repetition Theorem for Free Projection Games

  • Authors:
  • Boaz Barak;Anup Rao;Ran Raz;Ricky Rosen;Ronen Shaltiel

  • Affiliations:
  • Department of Computer Science, Princeton University,;Institute for Advanced Study,;Faculty of mathematics and computer science, Weizmann Institute,;Department of Computer Science, Tel-Aviv University,;Department of Computer Science, Haifa University,

  • Venue:
  • APPROX '09 / RANDOM '09 Proceedings of the 12th International Workshop and 13th International Workshop on Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques
  • Year:
  • 2009

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Abstract

The parallel repetition theorem states that for any two provers one round game with value at most 1 *** *** (for *** n times in parallel is at most (1 *** *** 3)***(n /logs ) where s is the size of the answers set [Raz98],[Hol07]. For Projection Games the bound on the value of the game repeated n times in parallel was improved to (1 *** *** 2)***(n ) [Rao08] and was shown to be tight [Raz08]. In this paper we show that if the questions are taken according to a product distribution then the value of the repeated game is at most (1 *** *** 2)***(n /logs ) and if in addition the game is a Projection Game we obtain a strong parallel repetition theorem, i.e., a bound of (1 *** *** )***(n ).