Aslanov, Afgan2025-03-262025-03-2620221660-54461660-545410.1007/s00009-022-02154-82-s2.0-85138150375https://doi.org/10.1007/s00009-022-02154-8https://hdl.handle.net/20.500.14704/1020We study the existence of solutions of second-order nonlinear differential equations. It is shown that the second-order nonlinear differential equation x '' = f (t, x, x') has a positive (and so non-oscillatory) solution asymptotic to the function phi(t) = t at infinity and satisfies the initial condition x(0) = 0.eninfo:eu-repo/semantics/closedAccessMonotone positive solutions; second order nonlinear differential equations; fixed point theoryArticle5Q219WOS:000852414000019Q1