We provide a simple and efficient population protocol for leader election that uses O(log n) states and elects exactly one leader in O(n (log n)^2) interactions with high probability and in expectation. Our analysis is simple and based on fundamental stochastic arguments. Our protocol combines the tournament based leader elimination by Alistarh and Gelashvili, ICALP'15, with the synthetic coin introduced by Alistarh et al., SODA'17.
@InProceedings{berenbrink_et_al:OASIcs.SOSA.2018.9, author = {Berenbrink, Petra and Kaaser, Dominik and Kling, Peter and Otterbach, Lena}, title = {{Simple and Efficient Leader Election}}, booktitle = {1st Symposium on Simplicity in Algorithms (SOSA 2018)}, pages = {9:1--9:11}, series = {Open Access Series in Informatics (OASIcs)}, ISBN = {978-3-95977-064-4}, ISSN = {2190-6807}, year = {2018}, volume = {61}, editor = {Seidel, Raimund}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.SOSA.2018.9}, URN = {urn:nbn:de:0030-drops-83029}, doi = {10.4230/OASIcs.SOSA.2018.9}, annote = {Keywords: population protocols, leader election, distributed, randomized} }
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