1 citations · 2 across the 4 of their papers we have counts for
4 papers
On generating relative and absolute invariants of linear differential equations
J. C. Ndogmo
A general expression for a relative invariant of a linear ordinary differential equations is given in terms of the fundamental semi-invariant and an absolute invariant. This result…
Invariants associated with linear ordinary differential equations
J. C. Ndogmo
We apply a novel method for the equivalence group and its infinitesimal generators to the investigation of invariants of linear ordinary differential equations. First, a comparativ…
Symmetry properties of a nonlinear acoustics model
J. C. Ndogmo
We give a classification into conjugacy classes of subalgebras of the symmetry algebra generated by the Zabolotskaya-Khokhlov equation, and obtain all similarity reductions of this…
Casimir operators of Lie algebras with a nilpotent radical
J. C. Ndogmo
We show that a Lie algebra having a nilpotent radical has a fundamental set of invariants consisting of Casimir operators. We give a different proof of this fact in the special and…