English

Minimal graph in which the intersection of two longest paths is not a separator

Combinatorics 2021-05-26 v1

Abstract

We prove that for a connected simple graph GG with n10n\le 10 vertices, and two longest paths CC and DD in GG, the intersection of vertex sets V(C)V(D)V(C)\cap V(D) is a separator. This shows that the graph found previously with n=11n=11, in which the complement of the intersection of vertex sets V(C)V(D)V(C)\cap V(D) of two longest paths is connected, is minimal.

Keywords

Cite

@article{arxiv.2105.11633,
  title  = {Minimal graph in which the intersection of two longest paths is not a separator},
  author = {Juan Gutiérrez and Christian Valqui},
  journal= {arXiv preprint arXiv:2105.11633},
  year   = {2021}
}
R2 v1 2026-06-24T02:25:47.856Z