We analyze the stabilization time of minority processes in graphs. A minority process is a dynamically changing coloring, where each node repeatedly changes its color to the color which is least frequent in its neighborhood. First, we present a simple Omega(n^2) stabilization time lower bound in the sequential adversarial model. Our main contribution is a graph construction which proves a Omega(n^(2-epsilon)) stabilization time lower bound for any epsilon>0. This lower bound holds even if the order of nodes is chosen benevolently, not only in the sequential model, but also in any reasonable concurrent model of the process.
@InProceedings{papp_et_al:LIPIcs.ISAAC.2019.43, author = {Papp, P\'{a}l Andr\'{a}s and Wattenhofer, Roger}, title = {{Stabilization Time in Minority Processes}}, booktitle = {30th International Symposium on Algorithms and Computation (ISAAC 2019)}, pages = {43:1--43:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-130-6}, ISSN = {1868-8969}, year = {2019}, volume = {149}, editor = {Lu, Pinyan and Zhang, Guochuan}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ISAAC.2019.43}, URN = {urn:nbn:de:0030-drops-115393}, doi = {10.4230/LIPIcs.ISAAC.2019.43}, annote = {Keywords: Minority process, Benevolent model} }
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