Mamoon Abdullah

collaborators

3 papers

math.CO2024

Towards a classification of $1$ -homogeneous distance-regular graphs with positive intersection number $a_{1}$

Jack H. Koolen, Mamoon Abdullah, Brhane Gebremichel +1

Let $Γ$ be a graph with diameter at least two. Then $Γ$ is said to be $1$ -homogeneous (in the sense of Nomura) whenever for every pair of adjacent vertices $x$ and $y$ in $Γ$ , the…

math.CO2024

Distance-regular graphs with a few $q$ -distance eigenvalues

Mamoon Abdullah, Brhane Gebremichel, Sakander Hayat +1

In this paper we study when the $q$ -distance matrix of a distance-regular graph has few distinct eigenvalues. We mainly concentrate on diameter 3.

physics.flu-dyn2018

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…

Towards a classification of 1-homogeneous distance-regular graphs with positive intersection number a1​

Distance-regular graphs with a few q-distance eigenvalues

Discrete resonant Rossby/drift wave triads: an explicit parameterisation and a fast direct numerical search algorithm

Towards a classification of $1$ -homogeneous distance-regular graphs with positive intersection number $a_{1}$

Distance-regular graphs with a few $q$ -distance eigenvalues