pith. sign in

arxiv: math/0702723 · v3 · submitted 2007-02-24 · 🧮 math.CO

Chromatic number and spectral radius

classification 🧮 math.CO
keywords chromaticeigenvaluelargestnumberadjacencycomplementinggraphhoffman
0
0 comments X
read the original abstract

Let G be a graph, H be its chromatic number, L be the largest eigenvalue of its Laplacian, and M be the largest eigenvalue of its adjacency matrix. Then, complementing a well-known result of Hoffman, we show that L>=(H/(H-1))M

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.