On a class of sublinear singular elliptic problems with convection term

We establish several results related to existence, nonexistence or bifurcation of positive solutions for the boundary value problem −Δu+K(x)g(u)+|∇u|a=λf(x,u) in Ω, u=0 on ∂Ω, where Ω⊂RN(N⩾2) is a smooth bounded domain, 0