Abstract
An acyclic edge coloring of a graph G is a proper edge coloring such that no bichromatic cycles are produced. The acyclic chromatic index a′(G) of G is the smallest integer k such that G has an acyclic edge coloring using k colors. In this paper, we prove that every planar graph G with girth g(G)≥5 and maximum degree Δ≥12 has a′(G)=Δ.
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Research supported partially by NSFC (Nos. 10771197, 11071223) and ZJNSF (No. Z6090150).
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Shu, Q., Wang, W. Acyclic chromatic indices of planar graphs with girth at least five. J Comb Optim 23, 140–157 (2012). https://doi.org/10.1007/s10878-010-9354-2
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DOI: https://doi.org/10.1007/s10878-010-9354-2