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• W2057121017 startingPage "95" @default.
• W2057121017 abstract "Two identical (anonymous) mobile agents start from arbitrary nodes of an unknown tree and have to meet at some node. Agents move in synchronous rounds: in each round an agent can either stay at the current node or move to one of its neighbors. We consider deterministic algorithms for this rendezvous task. The main result of this paper is a tight trade-off between the optimal time of completing rendezvous and the size of memory of the agents. For agents with $$k$$ memory bits, we show that optimal rendezvous time is $$Theta (n+n^2/k)$$ in $$n$$ -node trees. More precisely, if $$k ge clog n$$ , for some constant $$c$$ , we design agents accomplishing rendezvous in arbitrary trees of size $$n$$ (unknown to the agents) in time $$O(n+n^2/k)$$ , starting with arbitrary delay. We also show that no pair of agents can accomplish rendezvous in time $$o(n+n^2/k)$$ , even in the class of lines of known length and even with simultaneous start. Finally, we prove that at least logarithmic memory is necessary for rendezvous, even for agents starting simultaneously in a $$n$$ -node line." @default.
• W2057121017 created "2016-06-24" @default.
• W2057121017 creator A5001475610 @default.
• W2057121017 creator A5067736776 @default.
• W2057121017 creator A5075900164 @default.
• W2057121017 date "2013-12-23" @default.
• W2057121017 modified "2023-10-13" @default.
• W2057121017 title "Time versus space trade-offs for rendezvous in trees" @default.
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• W2057121017 doi "https://doi.org/10.1007/s00446-013-0201-4" @default.
• W2057121017 hasPublicationYear "2013" @default.
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