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math-ph2021★ 1 cited
On the construction of almost general solutions for PDEs arising in nonlinear optics
A Ghose-Choudhury, Sudip Garai
In this communication we consider the widely used nonlinear Fokas-Lenells equation, the cubic focussing nonlinear Schrödinger equation in (2+1)-dimensions and the coupled Drinfel'd…
math-ph2016★ 14 cited
Noetherian symmetries of noncentral forces with drag term
A. Ghose-Choudhury, Partha Guha, Andronikos Paliathanasis +1
We consider the Noetherian symmetries of second-order ODEs subjected to forces with nonzero curl. Both position and velocity dependent forces are considered. In the former case the…
math-ph2016
Monotonicity of the period function of the Liénard equation of second kind
A Ghose-Choudhury, Partha Guha
This paper is concerned with the monotonicity of the period function for closed orbits of systems of the Liénard II type equation given by .…