June 10, 2023
Doost Ali Mojdeh

Doost Ali Mojdeh

Degree: Professor
Address: Department of Mathematics, University of Mazandaran, Babolsar, Iran
Education: Ph.D in Mathematics (Graph Theory and Combinatorics)
Phone: 011-35302448
Faculty: Faculty of Mathematical Sciences


Title Tetracyclic graphs with maximal Estrada index
Type Article
Eigenvalue, Estrada index, Four-cyclic graph, Walk.
Journal Discrete Mathematics, Algorithms and Applications
DOI DOI:10.1142/S1793830917500410
Researchers Nader Jafari Rad (First researcher) , Akbar Jahanbani (Second researcher) , Doost Ali Mojdeh (Third researcher)


The Estrada index of a simple connected graph GG of order nn is defined as EE(G)=∑ni=1eλiEE(G)=∑i=1neλi, where λ1,λ2,…,λnλ1,λ2,…,λn are the eigenvalues of the adjacency matrix of GG. In this paper, we characterize all tetracyclic graphs of order nn with maximal Estrada index.