Research in graph theory has lead to one of the important area called labeling of graphs. There are different types of labeling such as graceful labeling, magic labeling, edge-graceful labeling, prime labeling, radio labeling, harmonious labeling etc., In this paper, we investigate the existence of edge graceful labeling for the Corona graph C_n O K_2 (n is odd, n > 3). Also we have defined a flower graph which does not admit an edge-graceful labeling.
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机译：图表理论的研究导致了一个称为图形标记的重要领域。有不同类型的标签，如优雅的标签，魔术标签，优雅的标签，主要标签，无线电标签，和谐标签等，在本文中，我们调查了电晕图C_N O K_2的边缘优雅标签的存在（ n是奇数，n> 3）。我们也定义了一种花图，不承认优雅的标签。
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