Abstract
An adjacent vertex distinguishing edge-coloring of a graph G is a proper edge coloring of G such that any pair of adjacent vertices are incident to distinct sets of colors. The minimum number of colors required for an adjacent vertex distinguishing edge-coloring of G is denoted by χ′ a (G). Let \(\mathop{\mathrm{mad}}(G)\) and Δ denote the maximum average degree and the maximum degree of a graph G, respectively.
In this paper, we prove the following results: (1) If \(\mathop{\mathrm{mad}}(G)<3\) and Δ≥3, then χ′ a (G)≤Δ+2. (2) If \(\mathop{\mathrm{mad}}(G)<\frac{5}{2}\) and Δ≥4, or \(\mathop{\mathrm{mad}}(G)<\frac{7}{3}\) and Δ=3, then χ′ a (G)≤Δ+1. (3) If \(\mathop{\mathrm{mad}}(G)<\frac{5}{2}\) and Δ≥5, then χ′ a (G)=Δ+1 if and only if G contains adjacent vertices of maximum degree.
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References
Aigner M, Triesch E, Tuza Z (1992) Irregular assignments and vertex-distinguishing edge-colorings of graphs. In: Barlotti A et al. (eds) Proceedings of combinatorics ’90. North-Holland, Amsterdam, pp 1–9
Akbari S, Bidkhori H, Nosrati N (2006) r-Strong edge colorings of graphs. Discrete Math 306:3005–3010
Balister PN, Riordan OM, Schelp RH (2003) Vertex-distinguishing edge colorings of graphs. J Graph Theory 42:95–109
Balister PN, Győri E, Lehel J, Schelp RH (2007) Adjacent vertex distinguishing edge-colorings. SIAM J Discrete Math 21:237–250
Bu Y, Lih K-W, Wang W (2007) Adjacent vertex distinguishing edge-colorings of planar graphs with girth at least six. Submitted
Burris AC, Schelp RH (1997) Vertex-distinguishing proper edge-colorings. J Graph Theory 26:70–82
Favaron O, Li H, Schelp RH (1996) Strong edge colorings of graphs. Discrete Math 159:103–109
Hatami H (2005) Δ+300 is a bound on the adjacent vertex distinguishing edge chromatic number. J Comb Theory Ser B 95:246–256
Montassier M, Raspaud A (2006) (d,1)-Total labeling of graphs with a given maximum average degree. J Graph Theory 51:93–109
Vizing VG (1964) On an estimate of the chromatic index of a p-graph. Diskret Anal 3:25–30
Zhang Z, Liu L, Wang J (2002) Adjacent strong edge coloring of graphs. Appl Math Lett 15:623–626
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Research supported partially by NSFC (No. 10771197).
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Wang, W., Wang, Y. Adjacent vertex distinguishing edge-colorings of graphs with smaller maximum average degree. J Comb Optim 19, 471–485 (2010). https://doi.org/10.1007/s10878-008-9178-5
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DOI: https://doi.org/10.1007/s10878-008-9178-5