Extremal Digraphs Avoiding Distinct Walks of Length 4 with the Same Endpoints

IF 0.5 4区 数学 Q3 MATHEMATICS
Zhenhua Lyu
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引用次数: 8

Abstract

Abstract Let n ≥ 8 be an integer. We characterize the extremal digraphs of order n with the maximum number of arcs avoiding distinct walks of length 4 with the same endpoints.
极值有向图避免具有相同端点的长度为4的不同行走
设n≥8为整数。我们用最大数量的弧来刻画n阶的极值有向图,以避免相同端点的长度为4的不同行走。
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来源期刊
CiteScore
2.20
自引率
0.00%
发文量
22
审稿时长
53 weeks
期刊介绍: The Discussiones Mathematicae Graph Theory publishes high-quality refereed original papers. Occasionally, very authoritative expository survey articles and notes of exceptional value can be published. The journal is mainly devoted to the following topics in Graph Theory: colourings, partitions (general colourings), hereditary properties, independence and domination, structures in graphs (sets, paths, cycles, etc.), local properties, products of graphs as well as graph algorithms related to these topics.
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