3 papers
math.CO2026
On strongly regular signed graphs of higher girth
Quaid Iqbal, Thomas Zaslavsky
Strongly regular signed graphs are an extension of strongly regular graphs to the realm of signed graphs, that is, graphs where each edge is positive or negative. Unlike with ordin…
math.CO2018
There does not exist a distance-regular graph with intersection array
Jack H. Koolen, Quaid Iqbal, Jongyook Park +1
In this paper we will show that there does not exist a distance-regular graph with intersection array . We first show that a local graph of doe…
math.CO2015
Hypercubes are determined by their distance spectra
Jack. H. Koolen, Sakander Hayat, Quaid Iqbal
We show that the d-cube is determined by the spectrum of its distance matrix.