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research article

Monochromatic cycle covers in random graphs

Korandi, Daniel  
•
Mousset, Frank
•
Nenadov, Rajko
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December 1, 2018
Random Structures & Algorithms

A classic result of Erdos, Gyarfas and Pyber states that for every coloring of the edges of K-n with r colors, there is a cover of its vertex set by at most f(r)=O(r2logr) vertex-disjoint monochromatic cycles. In particular, the minimum number of such covering cycles does not depend on the size of K-n but only on the number of colors. We initiate the study of this phenomenon in the case where K-n is replaced by the random graph G(n,p). Given a fixed integer r and p=p(n)>= n-1/r+epsilon, we show that with high probability the random graph G similar to G(n,p) has the property that for every r-coloring of the edges of G, there is a collection of f '(r)=O(r8logr) monochromatic cycles covering all the vertices of G. Our bound on p is close to optimal in the following sense: if pMUCH LESS-THAN(logn/n)1/r, then with high probability there are colorings of G similar to G(n,p) such that the number of monochromatic cycles needed to cover all vertices of G grows with n.

  • Details
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Type
research article
DOI
10.1002/rsa.20819
Web of Science ID

WOS:000449519300007

Author(s)
Korandi, Daniel  
Mousset, Frank
Nenadov, Rajko
Skoric, Nemanja
Sudakov, Benny
Date Issued

2018-12-01

Publisher

WILEY

Published in
Random Structures & Algorithms
Volume

53

Issue

4

Start page

667

End page

691

Subjects

Computer Science, Software Engineering

•

Mathematics, Applied

•

Mathematics

•

Computer Science

•

cycle cover

•

monochromatic cycles

•

random graphs

•

partitions

Note

18th International Conference on Random Structures and Algorithms, Gniezno, POLAND, Aug 07-11, 2017

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
DCG  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/152090
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