Lie symmetries, Kac-Moody-Virasoro algebras and integrability of certain (2+1)-dimensional nonlinear evolution equations

TL;DR

This paper explores the Lie symmetries and algebraic structures of two (2+1)-dimensional nonlinear evolution equations, revealing that not all integrable systems possess Kac-Moody-Virasoro subalgebras and providing special solutions.

Contribution

It analyzes the symmetry structures of specific integrable equations, showing the absence of Virasoro subalgebras in some cases and deriving physically relevant solutions.

Findings

Not all integrable higher-dimensional systems admit Kac-Moody-Virasoro subalgebras.

The studied equations do not admit Virasoro type subalgebras.

Physically interesting solutions are obtained for special symmetry parameters.

Abstract

In this paper we study Lie symmetries, Kac-Moody-Virasoro algebras, similarity reductions and particular solutions of two different recently introduced (2+1)-dimensional nonlinear evolution equations, namely (i) (2+1)-dimensional breaking soliton equation and (ii) (2+1)-dimensional nonlinear Schr\"odinger type equation introduced by Zakharov and studied later by Strachan. Interestingly our studies show that not all integrable higher dimensional systems admit Kac-Moody-Virasoro type sub-algebras. Particularly the two integrable systems mentioned above do not admit Virasoro type subalgebras, eventhough the other integrable higher dimensional systems do admit such algebras which we have also reviewed in the Appendix. Further, we bring out physically interesting solutions for special choices of the symmetry parameters in both the systems.