Figure 5From: Nonstandard finite difference variational integrators for nonlinear Schrödinger equation with variable coefficients l 2 -error e k of integrator (14) with increasing time step sizes. The l 2 -errors of integrator (14) for the NLSE with variable coefficients (16) (μ=1) with time step sizes Δt=0.1,0.2,0.4,0.6, and Δx=0.05.Back to article page