24 citations · 89 across the 18 of their papers we have counts for
4 papers · 1 filter
Symmetry analysis of the Klein-Gordon equation in Bianchi I spacetimes
A. Paliathanasis, M. Tsamparlis, M. T. Mustafa
In this work we perform the symmetry classification of the Klein Gordon equation in Bianchi I spacetime. We apply a geometric method which relates the Lie symmetries of the Klein G…
On computing joint invariants of vector fields
H. Azad, I. Biswas, R. Ghanam +1
A constructive version of the Frobenius integrability theorem -- that can be programmed effectively -- is given. This is used in computing invariants of groups of low ranks and rec…
Invariants of third-order ordinary differential equations via fiber preserving transformations
Ahmad Y. Al-Dweik, M. T. Mustafa, H. Azad +1
Bagderina \cite{Bagderina2008} solved the equivalence problem for scalar third-order ordinary differential equations (ODEs), quadratic in the second-order derivative, via point tra…
Higher order self-adjoint operators with polynomial coefficients
H. Azad, A. Laradji, M. T. Mustafa
Algebraic and analytic aspects of self-adjoint operators of order four or more with polynomial coefficients are investigated. As a consequence, a systematic way of constructing suc…