Uniqueness of solution of Neumann problem for nonlinear elliptic equation Original Research Article

We prove, under assumptions lgρ(u)lgρ(u) concave and View the MathML sourcea(x,u,ξ)ρ(u) increasing in uu, existence and uniqueness of solutions u∈W1,p(Ω)∩L∞(Ω)u∈W1,p(Ω)∩L∞(Ω) to equations of the form View the MathML source