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  • 标题:Direct product via round-preserving compression
  • 本地全文:下载
  • 作者:Mark Braverman ; Anup Rao ; Omri Weinstein
  • 期刊名称:Electronic Colloquium on Computational Complexity
  • 印刷版ISSN:1433-8092
  • 出版年度:2013
  • 卷号:2013
  • 出版社:Universität Trier, Lehrstuhl für Theoretische Computer-Forschung
  • 摘要:

    We obtain a strong direct product theorem for two-party bounded round communication complexity.Let \sucr(fC) denote the maximum success probability of an r-round communication protocol that uses at most C bits of communication in computing f(xy) when (xy) . Jain et al. \cite{JainPP12} have recently showed that if \sucr(fC)32 andT(C−(r2))rn, then \sucr(nfnT)exp(−(nr2)) .Here we prove that if \suc7r(fC)32 and T(C−(rlogr))n then\sucr(nfnT)exp(−(n)) . Up to a logr factor, our result asymptotically matches the upper bound on \suc7r(nfnT) given by the trivial solution which applies the per-copy optimal protocol independently to each coordinate.The proof relies on a compression schemethat improves the tradeoff between the number of rounds and the communication complexity over known compression schemes.

  • 关键词:Communication complexity; information complexity; Interactive compression
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