Positive Solutions For Quasilinear Elliptic Equations With Nonlinear Neumann Boundary Conditions And Convective Term

we consider a positive solution for elliptic problems driven by the p-Laplacian and with nonlinear Neumann boundary conditions and convective term.because the equation does not have a variational structure,we can't use a variational method.a priori estimates of the solution of the problem is obtained,by appropriate perturbation methods and the theory of nonlinear operators of monotone,we obtain the existence of smooth solutions to such problems.