Continuation Theory for A-Proper Mappings and their Uniform Limits and Nonlinear Perturbations of Fredholm Mappings

Since the classical continuation theorem of Leray and Shauder, which has yielded a large number of existence results in the theory of nonlinear integral and differential equations, various new continuation results have been established for diverse classes of nonlinear operators. We refer to [63 64 65 66 67 68,53] for a detailed discussion and references.