English

Most Laplacian eigenvalues of a tree are small

Combinatorics 2020-08-05 v3

Abstract

We show that the number of Laplacian eigenvalues greater than the average degree of a tree having nn vertices is at most n2\lfloor\frac{n}{2} \rfloor.

Keywords

Cite

@article{arxiv.1907.00234,
  title  = {Most Laplacian eigenvalues of a tree are small},
  author = {David P. Jacobs and Elismar R. Oliveira and Vilmar Trevisan},
  journal= {arXiv preprint arXiv:1907.00234},
  year   = {2020}
}

Comments

31 pages, 27 figures, accepted for publication in JCTB

R2 v1 2026-06-23T10:07:33.683Z