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Coupon coloring is a new coloring which has many applications. A k-coupon coloring of a graph G is a k-coloring of G by colors [k]={1,2,…,k} such that the neighborhood of every vertex of G contains vertices of all colors from [k]. The maximum integer k for which a k-coupon coloring exists is called the coupon coloring number of G, and it is denoted by χc(G). In this paper, we studied the coupon coloring...
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