Strong cospectrality in trees
Combinatorics
2022-06-08 v1
Abstract
We prove that no tree contains a set of three vertices which are pairwise strongly cospectral. This answers a question raised by Godsil and Smith in 2017.
Cite
@article{arxiv.2206.02995,
title = {Strong cospectrality in trees},
author = {Gabriel Coutinho and Emanuel Juliano and Thomás Jung Spier},
journal= {arXiv preprint arXiv:2206.02995},
year = {2022}
}
Comments
13 pages