... distri-bution, and reproduction in any medium, provided the original work is properly cited.1. IntroductionWe consider the following nonvariational problem:− Δmu = f (x, u,∇u) − a(x)g(u,∇u)+τ in ... positivesolutions of problem (P)τunder certain conditions on the functions f , g, a. This resultimplies nonexistence of positive solutions to τ large enough.Also we are interested in the existence of ... denote the set of the solutions to the problemu= G(t,u)(P) in R+× E.LetC denote the component (closed connected maximal subset with respect to the inclusion) of J to which (0,0) belongs. Then...