Fixed points for planar maps with multiple twists, with application to nonlinear equations with indefinite weight
Fixed points for planar maps with multiple twists, with application to nonlinear equations with indefinite weight
In this paper, we investigate the dynamical properties associated with planar maps which can be represented as a composition of twist maps together with expansive–contractive homeomorphisms. The class of maps we consider present some common features both with those arising in the context of the Poincaré–Birkhoff theorem and those studied …