On the number of solutions in random graph k-colouring

F Rassmann - Combinatorics, Probability and Computing, 2019 - cambridge.org
Let k⩾ 3 be a fixed integer. We exactly determine the asymptotic distribution of ln Zk (G (n,
m)), where Zk (G (n, m)) is the number of k-colourings of the random graph G (n, m). A crucial …

Planting colourings silently

V Bapst, A Coja-Oghlan, C Efthymiou - … , probability and computing, 2017 - cambridge.org
Let k⩾ 3 be a fixed integer and let Zk (G) be the number of k-colourings of the graph G. For
certain values of the average degree, the random variable Zk (G (n, m)) is known to be …

Local convergence of random graph colorings

A Coja-Oghlan, C Efthymiou, N Jaafari - Combinatorica, 2018 - Springer
Let G= G (n, m) be a random graph whose average degree d= 2 m/n is below the k-
colorability threshold. If we sample ak-coloring σ of G uniformly at random, what can we say …

A Sharp Threshold for k‐Colorability

D Achlioptas, E Friedgut - Random Structures & Algorithms, 1999 - Wiley Online Library
Let k be a fixed integer and fk (n, p) denote the probability that the random graph G (n, p) is k‐
colorable. We show that for k≥ 3, there exists dk (n) such that for any ϵ> 0, n → ∞ f_k\biggl …

Upper-bounding the k-colorability threshold by counting covers

A Coja-Oghlan - arXiv preprint arXiv:1305.0177, 2013 - arxiv.org
Let $ G (n, m) $ be the random graph on $ n $ vertices with $ m $ edges. Let $ d= 2m/n $ be
its average degree. We prove that $ G (n, m) $ fails to be $ k $-colorable with high probability …

Critical Exponent for the Acyclic Chromatic Number of Random Graphs

G Ganesan - arXiv preprint arXiv:2311.11728, 2023 - arxiv.org
In this paper we study acyclic colouring in the random subgraph $\mathit {G} $ of the
complete graph $\mathit {K} _n $ on $\mathit {n} $ vertices where each edge is present with …

[HTML][HTML] Random regular graphs of non-constant degree: concentration of the chromatic number

S Ben-Shimon, M Krivelevich - Discrete Mathematics, 2009 - Elsevier
In this work we show that with high probability the chromatic number of a graph sampled
from the random regular graph model Gn, d for d= o (n1/5) is concentrated in two …

Local convergence of random graph colorings

A Coja-Oghlan, C Efthymiou, N Jaafari - arXiv preprint arXiv:1501.06301, 2015 - arxiv.org
Let $ G= G (n, m) $ be a random graph whose average degree $ d= 2m/n $ is below the $ k
$-colorability threshold. If we sample a $ k $-coloring $\sigma $ of $ G $ uniformly at random …

Colouring random geometric graphs

CJH McDiarmid, T Müller - Discrete Mathematics & …, 2005 - dmtcs.episciences.org
A random geometric graph G_n is obtained as follows. We take X_1,X_2,...,X_n∈R^d at
random (iid according to some probability distribution ν on R^d). For i≠j we join X_i and X_j …

[HTML][HTML] Colouring powers of cycles from random lists

M Krivelevich, A Nachmias - European Journal of Combinatorics, 2004 - Elsevier
Let Cnk be the kth power of a cycle on n vertices (ie the vertices of Cnk are those of the n-
cycle, and two vertices are connected by an edge if their distance along the cycle is at most …