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- W2140004544 abstract "The problem of electing a leader from among n contenders is one of the fundamental questions in distributed computing. In its simplest formulation, the task is as follows: given n processors, all participants must eventually return a win or lose indication, such that a single contender may win. Despite a considerable amount of work on leader election, the following question is still open: can we elect a leader in an asynchronous fault-prone system faster than just running a Θ(log n)-time tournament, against a strong adaptive adversary?In this paper, we answer this question in the affirmative, improving on a decades-old upper bound. We introduce two new algorithmic ideas to reduce the time complexity of electing a leader to O( log* n), using O(n2) point-to-point messages. A non-trivial application of our algorithm is a new upper bound for the tight renaming problem, assigning n items to the n participants in expected O(log2 n ) time and O(n2) messages. We complement our results with lower bound of Ω(n2) messages for solving these two problems, closing the question of their message complexity." @default.
- W2140004544 created "2016-06-24" @default.
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- W2140004544 date "2015-07-21" @default.
- W2140004544 modified "2023-09-23" @default.
- W2140004544 title "How To Elect a Leader Faster than a Tournament" @default.
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- W2140004544 doi "https://doi.org/10.1145/2767386.2767420" @default.
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