Positive solutions to a Dirichlet problem with p-Laplacian and concave-convex nonlinearity depending on a parameter

A nonlinear ellipti equations with p-Laplacian, concave-convex reaction term depending on a positive parameter, and homogeneous boundary condition, has been investigated. A bifurcation result, which describes the set of positive solutions as the parameter varies, is obtained through variational methods combined with truncation an conparison techniques.