3 papers
math.CO2026
-Neighbor Bootstrap Percolation on Odd Graphs
Ali Mohammadian, Sina Rezaie Zareie, Behruz Tayfeh-Rezaie
The -neighbor bootstrap percolation process on a graph is a vertex-activation process that begins with a set of initially active vertices. In each subsequent round, every in…
math.CO2026
A search for Hadamard matrices of Williamson type
Hadi Kharaghani, Ali Mohammadian, Behruz Tayfeh-Rezaie
In this article, we consider a special class of Williamson type matrices which we call them near Williamson matrices. They are in fact four -matrices $A, B, C,…
math.CO2025
On saturation numbers of complete multipartite graphs and even cycles
Ali Mohammadian, Milad Poursoltani, Behruz Tayfeh-Rezaie
Given positive integer and graph , the saturation number is the minimum number of edges in an edge-maximal -free graph on vertices. In this paper…