The Discrete Nonlinear Schrödinger Equation with Linear Gain and Nonlinear Loss: The Infinite Lattice with Nonzero Boundary Conditions and Its Finite-Dimensional Approximations. - Georgios Fotopoulos; Nikos I. Karachalios; Vassilis Koukouloyannis; P. Kyriazopoulos; Konstantinos Vetas (J. Nonlinear Sci., 2024)