In this paper three different types of colorings are studied, which are incidence coloring of graphs, acyclic edge coloring and strong edge coloring.
本文研究了三种不同的着色：图的关联着色、无圈边着色和强边着色。
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其次，引入强边着色、关联着色的定义。
Secondly, the article introduce the concept of strong edge coloring and incidence coloring.
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图的邻强边着色算法是一个NP完全问题。
The algorithm for the adjacent strong edge coloring of graphs is an NP-complete problem.
相邻强边着色数。
Adjacent strong edge chromatic number.
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