,
Yannic Maus
,
Alexandre Nolin
Creative Commons Attribution 4.0 International license
We present poly log log n-round randomized distributed algorithms to compute vertex splittings, a partition of the vertices of a graph into k parts such that a node of degree d(u) has ≈ d(u)/k neighbors in each part. Our techniques can be seen as the first progress towards general poly log log n-round algorithms for the Lovász Local Lemma. As the main application of our result, we obtain a randomized poly log log n-round CONGEST algorithm for (1+ε)Δ-edge coloring n-node graphs of sufficiently large constant maximum degree Δ, for any ε > 0. Further, our results improve the computation of defective colorings and certain tight list coloring problems. All the results improve the state-of-the-art round complexity exponentially, even in the LOCAL model.
@InProceedings{halldorsson_et_al:LIPIcs.DISC.2022.26,
author = {Halld\'{o}rsson, Magn\'{u}s M. and Maus, Yannic and Nolin, Alexandre},
title = {{Fast Distributed Vertex Splitting with Applications}},
booktitle = {36th International Symposium on Distributed Computing (DISC 2022)},
pages = {26:1--26:24},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-255-6},
ISSN = {1868-8969},
year = {2022},
volume = {246},
editor = {Scheideler, Christian},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2022.26},
URN = {urn:nbn:de:0030-drops-172176},
doi = {10.4230/LIPIcs.DISC.2022.26},
annote = {Keywords: Graph problems, Edge coloring, List coloring, Lov\'{a}sz local lemma, LOCAL model, CONGEST model, Distributed computing}
}