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arXiv 1904.03271cs.ITcs.DCmath.COmath.IT
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公共随机性生成的最优通信速率与组合性质

Optimal Communication Rates and Combinatorial Properties for Common Randomness Generation

Yanjun Han, Kedar Tatwawadi, Gowtham R. Kurri, Zhengqing Zhou, Vinod M. Prabhakaran, Tsachy Weissman

AI总结:

针对多参与者借助公共硬币与黑板生成一致随机序列的问题,本文用线性规划刻画最优通信速率,并为一类超图给出达到该速率的显式分布式模拟算法。

摘要:

我们研究公共随机性生成问题:其中 n 个参与者旨在生成相同的随机抛硬币序列,参与者的某些子集共享一枚独立的公共硬币,该硬币可以被抛掷多次,并且存在一块所有人可见的黑板,参与者通过它彼此通信。我们通过线性规划给出了最优通信速率的紧致刻画;更重要的是,针对一大类超图提出了用于最优分布式模拟的显式算法。特别地,完全超图中的最优通信速率在更稀疏的超图中仍然可以达到,这类稀疏超图包含一个由拓扑连通分量构成的路径连通且无环的簇。分析上界的一些关键步骤依赖于超图中两种不同的连通性定义,这些定义本身可能具有独立的研究价值。

英文摘要:

We study common randomness generation problems where $n$ players aim to generate same sequences of random coin flips where some subsets of the players share an independent common coin which can be tossed multiple times, and there is a publicly seen blackboard through which the players communicate with each other. We provide a tight representation of the optimal communication rates via linear programming, and more importantly, propose explicit algorithms for the optimal distributed simulation for a wide class of hypergraphs. In particular, the optimal communication rate in complete hypergraphs is still achievable in sparser hypergraphs containing a path-connected cycle-free cluster of topologically connected components. Some key steps in analyzing the upper bounds rely on two different definitions of connectivity in hypergraphs, which may be of independent interest.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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