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Random Structures and Algorithms
Article . 2025 . Peer-reviewed
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https://dx.doi.org/10.48550/ar...
Article . 2024
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Article . 2024
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The Clique Chromatic Number of Sparse Random Graphs

Authors: Manuel Fernandez; Lutz Warnke;

The Clique Chromatic Number of Sparse Random Graphs

Abstract

ABSTRACT The clique chromatic number of a graph is the smallest number of colors in a vertex coloring so that no maximal clique is monochromatic. In this paper, we determine the order of magnitude of the clique chromatic number of the random graph for most edge‐probabilities in the range . This resolves open problems and questions of Lichev, Mitsche, and Warnke as well as Alon and Krievelevich. One major proof difficulty stems from high‐degree vertices, which prevent maximal cliques in their neighborhoods: We deal with these vertices by an intricate union bound argument, that combines the probabilistic method with new degree counting arguments in order to enable Janson's inequality. This way we determine the asymptotics of the clique chromatic number of in some ranges, and discover a surprising new phenomenon that contradicts earlier predictions for edge‐probabilities close to .

Keywords

FOS: Computer and information sciences, 05C15, 05C80, 60C05, Discrete Mathematics (cs.DM), Probability (math.PR), FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), Mathematics - Probability, Computer Science - Discrete Mathematics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green