Abstract
An edge colored graph G is rainbow edge connected if any two vertices are connected by a path whose edges have distinct colors. The rainbow connectivity of a connected graph G, denoted by rc(G), is the smallest number of colors that are needed in order to make G rainbow connected.
In this work we study the rainbow connectivity of binomial random graphs at the connectivity threshold \(p=\frac{\log n+\omega }{n}\) where ω = ω(n) → ∞ and ω = o(logn) and of random r-regular graphs where r ≥ 3 is a fixed integer. Specifically, we prove that the rainbow connectivity rc(G) of G = G(n,p) satisfies \(rc(G) \sim \max\left\{Z_1,diameter(G)\right\}\) with high probability (whp). Here Z 1 is the number of vertices in G whose degree equals 1 and the diameter of G is asymptotically equal to \(\frac{ \log{n}}{\log{\log{n}}}\) whp. Finally, we prove that the rainbow connectivity rc(G) of the random r-regular graph G = G(n,r) satisfies rc(G) = O(log2 n) whp.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Ananth, P., Nasre, M., Sarpatwar, K.: Rainbow Connectivity: Hardness and Tractability. In: IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS), pp. 241–251 (2011)
Bollobás, B.: Random Graphs. Cambridge University Press (2001)
Caro, Y., Lev, A., Roditty, Y., Tuza, Z., Yuster, R.: On rainbow connection. Electronic Journal of Combinatorics 15 (2008), http://www.combinatorics.org/Volume_15/PDF/v15i1r57.pdf
Chakrabory, S., Fischer, E., Matsliah, A., Yuster, R.: Hardness and Algorithms for Rainbow Connection. Journal of Combinatorial Optimization 21(3) (2011)
Chartrand, G., Johns, G.L., McKeon, K.A., Zhang, P.: Rainbow connection in graphs. Mathematica Bohemica 133(1), 85–98 (2008), http://mb.math.cas.cz/mb133-1/8.html
Erdös, P., Rényi, A.: On Random Graphs I. Publicationes Mathematicae 6, 290–297 (1959)
He, J., Liang, H.: On rainbow-k-connectivity of random graphs. Arxiv 1012.1942v1 (2010), http://arxiv.org/abs/1012.1942v1
Jerrum, M.R.: A very simple algorithm for estimating the number of k-colourings of a low-degree graph. Random Structures and Algorithms 7(2), 157–165 (1995)
Krivelevich, M., Yuster, R.: The rainbow connection of a graph is (at most) reciprocal to its minimum degree. Journal of Graph Theory 63(3), 185–191 (2009)
Li, X., Sun, Y.: Rainbow connections of graphs - A survey. Arxiv 1101.5747v2 (2011), http://arxiv.org/abs/1101.5747
Wormald, N.C.: Models of random regular graphs. In: Surveys in Combinatorics. London Mathematical Society Lecture Note Series, vol. 276, pp. 239–298 (1999)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Frieze, A., Tsourakakis, C.E. (2012). Rainbow Connectivity of Sparse Random Graphs. In: Gupta, A., Jansen, K., Rolim, J., Servedio, R. (eds) Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques. APPROX RANDOM 2012 2012. Lecture Notes in Computer Science, vol 7408. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32512-0_46
Download citation
DOI: https://doi.org/10.1007/978-3-642-32512-0_46
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-32511-3
Online ISBN: 978-3-642-32512-0
eBook Packages: Computer ScienceComputer Science (R0)