Global existence and multiplicity of solutions for nonlinear singular eigenvalue problems

We consider a singular eigenvalue problem driven by a nonlinear nonhomogeneous differential operator. The singular term is not decoupled from the rest of the reaction, as is the case in most singular elliptic problems. Using variational tools together with truncation and comparison techniques, we prove an existence and multiplicity theorem which is global in the parameter (a bifurcation-type result giving a complete description of the spectrum).