Necessary and sufficient conditions for the nonlinear difference operator $(Dx)(t) = x(t + 1) - f(x(t))$ to be invertible in the space of functions bounded and continuous on the axis. НК [Internet]. 2002 Sep. 29 [cited 2026 Jan. 22];5(3):380-6. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/228