This short note completes the symmetry analysis of a class of quasi-linear partial differential equations considered in the previous paper (Nonlinear Dynamics 51: 309–316, 2008): it deals with an “exceptional” Lie point symmetry which is admitted only if the involved parameters are fixed by precise relationships. The peculiarity of this symmetry is enhanced by the fact that, combined with the presence of a conditional symmetry of “weak” type, it leads to a family of solutions which include, as a particular case, a relevant solution of the Grad–Schlüter–Shafranov equation, well known in plasma physics.
|Titolo:||Symmetry classification of quasi-linear PDE's: II. An exceptional case|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1007/s11071-011-0179-z|
|Appare nelle tipologie:||1.1 Articolo in rivista|