Rounds vs queries trade-off in noisy computation

  • Authors:
  • Navin Goyal;Michael Saks

  • Affiliations:
  • Rutgers University, Piscataway, NJ;Rutgers University, Piscataway, NJ

  • Venue:
  • SODA '05 Proceedings of the sixteenth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2005

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Abstract

We show that a noisy parallel decision tree making O(n) queries needs Ω(log* n) rounds to compute OR of n bits. This answers a question of Newman [21]. We prove more general trade-offs between the number of queries and rounds. We also completely settle a similar question for computing MAX in the noisy comparison tree model; these results bring out interesting differences among the noise models.