S. Akbari

activity

20092017

most citedA conjecture on square roots of Laplacian and signless Laplacian eigenvalues of graphs

2 citations · 3 across the 3 of their papers we have counts for

collaborators

3 papers

math.CO2017

Chromatic Number and Dichromatic Polynomial of Digraphs

Saeed Akbari, Amir Hossein Ghodrati, Afrouz Jabalameli +1

Let $G$ be a graph of order $n$ . It is well-known that $α (G) \geq \sum_{i = 1}^{n} \frac{1}{1 + d _{i}}$ , where $α (G)$ is the independence number of $G$ and $d_{1}, \dots, d_{n}$ is the degree se…

math.CO2015★ 1 cited

Zero-sum flows for Steiner triple systems

S. Akbari, A. C. Burgess, P. Danziger +1

Given a $2$ - $(v, k, λ)$ design, $S = (X, B)$ , a {\it zero-sum $n$ -flow} of $S$ is a map $f : B ⟶ {\pm 1, \dots, \pm (n - 1)}$ such that for any poi…

math.CO2009★ 2 cited

A conjecture on square roots of Laplacian and signless Laplacian eigenvalues of graphs

S. Akbari, E. Ghorbani, M. R. Oboudi

We conjecture that the sum of the square roots of the Laplacian eigenvalues of a graph does not exceed the sum of the square roots of its signless Laplacian eigenvalues.