Degree sums and subpancyclicity in line graphs

Liming Xiong*, H.J. Broersma, C. Hoede, Xueliang Li

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
85 Downloads (Pure)


A graph is called subpancyclic if it contains a cycle of length k for each k between 3 and the circumference of the graph. In this paper, we show that if the degree sum of the vertices along each 2-path of a graph G exceeds (n+6)/2, or if the degree sum of the vertices along each 3-path of G exceeds (2n+16)/3, then its line graph L(G) is subpancyclic. Simple examples show that these bounds are best possible. Our results shed some light on the content of a famous Metaconjecture of Bondy.
Original languageEnglish
Pages (from-to)255-267
Number of pages13
JournalDiscrete mathematics
Issue number1-3
Publication statusPublished - 2002


  • Line graph
  • Path
  • Subpancyclicity
  • Degree sum


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