Nonnegative solutions are established for nonlinear integral equations where the nonlinearity G(t, y) may be singular at y = 0. Existence is established using the Leray–Schauder...
In this work, the authors consider the boundary value problem y + a(t)y = g(t) f (y), 0 t 2, y(0) = y(2), y (0) = y (2), and establish the existence of nonnegative solutions in ...