M. Habibi

collaborators

3 papers

math.CO2019

The Laplacian eigenvalue 2 of bicyclic graphs

Doost Ali Mojdeh, Mohammad Habibi, Masoumeh Farkhondeh

If $G$ is a graph, its Laplacian is the difference between diagonal matrix of its vertex degrees and its adjacency matrix. A one-edge connection of two graphs $G_{1}$ and $G_{2}$ i…

math.CO2019

The multiplicity of the Laplacian eigenvalue $2$ in some bicyclic graphs

Masoumeh Farkhondeh, Mohammad Habibi, Dost Ali Mojdeh +1

The Laplacian matrix of a graph $G$ is denoted by $L (G) = D (G) - A (G)$ , where $D (G) = d ia g (d (v_{1}), \dots, d (v_{n}))$ is a diagonal matrix and $A (G)$ is the adjacency matrix of $G$ . Le…

math.RA2010

A note on co-maximal graph of non-commutative rings

S. Akbari, M. Habibi, A. Majidinya +1

Let $R$ be a ring with unity. The graph $Γ (R)$ is a graph with vertices as elements of $R$ , where two distinct vertices $a$ and $b$ are adjacent if and only if $R a + R b = R$ . Let $Γ_2(…

The Laplacian eigenvalue 2 of bicyclic graphs

The multiplicity of the Laplacian eigenvalue 2 in some bicyclic graphs

A note on co-maximal graph of non-commutative rings

The multiplicity of the Laplacian eigenvalue $2$ in some bicyclic graphs