3 citations · 3 across the 4 of their papers we have counts for
4 papers
Towards a classification of -homogeneous distance-regular graphs with positive intersection number
Jack H. Koolen, Mamoon Abdullah, Brhane Gebremichel +1
Let be a graph with diameter at least two. Then is said to be -homogeneous (in the sense of Nomura) whenever for every pair of adjacent vertices and in , the…
Distance-regular graphs with a few -distance eigenvalues
Mamoon Abdullah, Brhane Gebremichel, Sakander Hayat +1
In this paper we study when the -distance matrix of a distance-regular graph has few distinct eigenvalues. We mainly concentrate on diameter 3.
Distance-regular graphs with exactly one positive -distance eigenvalue
Jack H. Koolen, Mamoon Abdullah, Brhane Gebremichel +1
In this paper, we study the -distance matrix for a distance-regular graph and show that the -distance matrix of a distance-regular graph with classical parameters ($D, q, α,…
Discrete resonant Rossby/drift wave triads: an explicit parameterisation and a fast direct numerical search algorithm
Umar Hayat, Shahid Amanullah, Shane Walsh +1
We report results on the explicit parameterisation of discrete Rossby-wave resonant triads of the Charney-Hasegawa-Mima equation in the small-scale limit (i.e. large Rossby deforma…