The notion of lambda-symmetries, originally introduced by C. Muriel and J.L. Romero, is extended to the case of systems of first-order ODEs (and of dynamical systems in particular). It is shown that the existence of a symmetry of this type produces a reduction of the differential equations, restricting the presence of the variables involved in the problem. The results are compared with the case of standard (i.e. exact) Liepoint symmetries and are also illustrated by some examples. (c) 2008 Elsevier B.V. All rights reserved.
|Autori interni:||CICOGNA, GIAMPAOLO|
|Titolo:||Reduction of systems of first-order differential equations via Lambda-symmetries|
|Anno del prodotto:||2008|
|Digital Object Identifier (DOI):||10.1016/j.physleta.2008.02.041|
|Appare nelle tipologie:||1.1 Articolo in rivista|