482 citations
- Institute for Research in Fundamental SciencesIR35 papers
- Shahid Beheshti UniversityIR10 papers
- Sharif University of TechnologyIR8 papers
- University of TehranIR8 papers
- Central State UniversityUS6 papers
- Ferdowsi University of MashhadIR6 papers
- Ohio UniversityUS6 papers
- Amirkabir University of TechnologyIR4 papers
- Marquette UniversityUS4 papers
- University of AlbertaCA4 papers
- University of CataniaIT4 papers
- Western UniversityCA4 papers
4 papers · 1 filter
More on the Annihilator-Ideal Graph of a Commutative Ring
M. J. Nikmehr, S. M. Hosseini
Let be a commutative ring with identity and be the set of ideals of with non-zero annihilator. The annihilator-ideal graph of , denoted by , is…
Maximum order of triangle-free graphs with a given rank
E. Ghorbani, A. Mohammadian, B. Tayfeh-Rezaie
The rank of a graph is defined to be the rank of its adjacency matrix. A graph is called reduced if it has no isolated vertices and no two vertices with the same set of neighbors.…
Inverses of triangular matrices and bipartite graphs
Ravindra Bapat, Ebrahim Ghorbani
To a given nonsingular triangular matrix A with entries from a ring, we associate a weighted bipartite graph G(A) and give a combinatorial description of the inverse of A by employ…
On eigenvalues of Seidel matrices and Haemers' conjecture
Ebrahim Ghorbani
For a graph , let be the Seidel matrix of and $\te_1(G),...,\te_n(G)$ be the eigenvalues of . The Seidel energy of is defined as $|\te_1(G)|+...+|\te_n(G)|$…