A. Ghafari

collaborators

2 papers

math.CO2018

Some Mixed Graphs Determined by Their Spectrum

S. Akbari, A. Ghafari, M. Nahvi +1

A mixed graph is obtained from a graph by orienting some of its edges. The Hermitian adjacency matrix of a mixed graph with the vertex set ${v_{1}, \dots, v_{n}}$ , is the mat…

math.CO2017

Some Criteria for a Signed Graph to Have Full Rank

S. Akbari, A. Ghafari, K. Kazemian +1

A weighted graph $G^{ω}$ consists of a simple graph $G$ with a weight $ω$ , which is a mapping, $ω$ : $E (G) \to Z \ {0}$ . A signed graph is a graph whose edges a…