Study of a fifth order PDE using symmetries
  We study a family of PDEs, which was derived as an approximation of an extended Lotka-Volterra system, from the point of view of symmetries. Also, by performing the self adjoint classification on that family we offer special cases possessing non trivial conservation laws. Using both classifications we justify the particular cases studied in the literature, and we give additional cases that may be of importance. 
Stylianos Dimas and Igor Leite Freire
math.AP math.DS