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Communication Complexity:From Two-Party to Multiparty

机译:沟通复杂度:从两方到多方

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We consider the multiparty communication complexity model, where k players holding inputs x1,...,.xk communicate to compute the value f(x1,..., xk) of a function f known to all of them. Yao's classic two-party communication complexity model [3] is the special case k = 2 (see also [2]). In the first part of the talk, we survey some basic results regarding the two-party model, emphasizing methods for proving lower-bounds. In the second part of the talk, we consider the case where there are at least three parties (k ≥ 3). The main lower bound technique for the communication complexity of such multiparty problems is that of partition arguments: partition the k players into two disjoint sets of players and find a lower bound for the induced two-party communication complexity problem. We discuss the power of partition arguments for both deterministic and randomized protocols. (This part is based on a joint work with Jan Draisma and Enav Weinreb [1].)
机译:我们考虑多方通信复杂性模型,其中k个持有输入x1,...,。xk的参与者进行通信以计算所有人都知道的函数f的值f(x1,...,xk)。姚的经典的两方通信复杂度模型[3]是特殊情况k = 2(另请参见[2])。在演讲的第一部分,我们调查了有关两方模型的一些基本结果,重点介绍了证明下界的方法。在演讲的第二部分,我们考虑至少有三个参与方(k≥3)的情况。解决此类多方问题的通信复杂性的主要下限技术是分区参数:将k个参与者分成两个不相交的参与者集,并为诱发的两方通信复杂性问题找到下限。我们讨论了确定性和随机协议的分区参数的功能。 (本部分基于与Jan Draisma和Enav Weinreb [1]的联合工作。)

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