Branches of Forced Oscillations for a Class of Implicit Equations Involving the Phi-Laplacian

We consider a class of parametric, implicit ordinary differential equations with a generalized -Laplacian-type term, and we study the structure of the set of forced oscillations in the presence of a periodic forcing term. Under suitable assumptions we obtain global bifurcation results whose statements require only conditions involving the well-known Brouwer degree in Euclidean spaces